    #[test]
    fn stash_precedes_the_submit() {

    #[test]
    fn every_key_command_is_preceded_by_a_settle_delay() {
        // F-019: a {key:*} that coalesces with the preceding {text} burst is literalized by CC's TUI
        // parser (enter->newline, ctrl+s swallowed). Every key MUST be separated from the prior write
        // by a {delay_ms} >= the coalesce threshold (120ms). Guards against a future refactor dropping
        // a delay and silently regressing submit/stash.
        let cmds = commands_for_event("payload");
        for (i, c) in cmds.iter().enumerate() {
            if c.get("key").is_some() {
                assert!(i > 0, "a key command cannot be first with nothing spacing it");
                let prev = &cmds[i - 1];
                let d = prev.get("delay_ms").and_then(Value::as_u64);
                assert!(
                    d.map(|d| d >= 120).unwrap_or(false),
                    "key command at {i} must be preceded by a >=120ms delay, got prev={prev}"
                );
            }
        }
    }

    #[test]
    fn stash_precedes_the_submit() {


The file C:\Users\decid\Documents\projects\spt-claude-code\tools\cc-spt-idle-translate\src\main.rs has been updated successfully. (file state is current in your context — no need to Read it back)

    #[test]
    fn every_key_command_is_preceded_by_a_settle_delay() {
        // F-019: a {key:*} that coalesces with the preceding {text} burst is literalized by CC's TUI
        // parser (enter->newline, ctrl+s swallowed). Every key MUST be separated from the prior write
        // by a {delay_ms} >= the coalesce threshold (120ms). Guards against a future refactor dropping
        // a delay and silently regressing submit/stash.
        let cmds = commands_for_event("payload");
        for (i, c) in cmds.iter().enumerate() {
            if c.get("key").is_some() {
                assert!(i > 0, "a key command cannot be first with nothing spacing it");
                let prev = &cmds[i - 1];
                let d = prev.get("delay_ms").and_then(Value::as_u64);
                assert!(
                    d.map(|d| d >= 120).unwrap_or(false),
                    "key command at {i} must be preceded by a >=120ms delay, got prev={prev}"
                );
            }
        }
    }

    #[test]
    fn stash_precedes_the_submit() {

+    fn every_key_command_is_preceded_by_a_settle_delay() {

+        // F-019: a {key:*} that coalesces with the preceding {text} burst is literalized by CC's TUI

+        // parser (enter->newline, ctrl+s swallowed). Every key MUST be separated from the prior write

+        // by a {delay_ms} >= the coalesce threshold (120ms). Guards against a future refactor dropping

+        // a delay and silently regressing submit/stash.

+        let cmds = commands_for_event("payload");

+        for (i, c) in cmds.iter().enumerate() {

+            if c.get("key").is_some() {

+                assert!(i > 0, "a key command cannot be first with nothing spacing it");

+                let prev = &cmds[i - 1];

+                let d = prev.get("delay_ms").and_then(Value::as_u64);

+                    d.map(|d| d >= 120).unwrap_or(false),

+                    "key command at {i} must be preceded by a >=120ms delay, got prev={prev}"

// ctrl+s (stash) is FIRST; the text is cmds[2]; enter submits; the {commit} terminator is last.


unfortunately, that did not work. still inserts a newline. verified the adapter version, even having stopped and restarted the spt daemon. --- /diagnose please troubleshoot using the tools at your dis…


Fix message submission in translation binary


The leading `ctrl+s` is at index 0 — my test would wrongly fail it. The real invariant is **no `{key}` directly adjacent to `{text}`** (the leading ctrl+s is protected by the delay *after* it). Rewrite:


Edit

    #[test]
    fn every_key_command_is_preceded_by_a_settle_delay() {
        // F-019: a {key:*} that coalesces with the preceding {text} burst is literalized by CC's TUI
        // parser (enter->newline, ctrl+s swallowed). Every key MUST be separated from the prior write
        // by a {delay_ms} >= the coalesce threshold (120ms). Guards against a future refactor dropping
        // a delay and silently regressing submit/stash.
        let cmds = commands_for_event("payload");
        for (i, c) in cmds.iter().enumerate() {
            if c.get("key").is_some() {
                assert!(i > 0, "a key command cannot be first with nothing spacing it");
                let prev = &cmds[i - 1];
                let d = prev.get("delay_ms").and_then(Value::as_u64);
                assert!(
                    d.map(|d| d >= 120).unwrap_or(false),
                    "key command at {i} must be preceded by a >=120ms delay, got prev={prev}"
                );
            }
        }
    }

    #[test]
    fn stash_precedes_the_submit() {

    #[test]
    fn keys_and_text_are_never_adjacent_without_a_settle_delay() {
        // F-019: a {key:*} adjacent to the {text} burst coalesces and CC's ink TUI literalizes it
        // (enter->newline, ctrl+s swallowed). A {delay_ms} >= the 120ms coalesce threshold MUST sit
        // between the text and EACH key. Guards against a refactor dropping a delay and silently
        // regressing submit/stash back to the F-019 failure.
        let cmds = commands_for_event("payload");
        let is_text = |c: &Value| c.get("text").is_some();
        let is_key = |c: &Value| c.get("key").is_some();
        for w in cmds.windows(2) {
            let adjacent = (is_text(&w[0]) && is_key(&w[1])) || (is_key(&w[0]) && is_text(&w[1]));
            assert!(!adjacent, "text and key must not be adjacent (need a settle delay): {w:?}");
        }
        let ti = cmds.iter().position(is_text).unwrap();
        // The delay after the text (before the submit key) and before the text (after the stash key)
        // must both clear the coalesce threshold.
        assert_eq!(cmds[ti + 1].get("delay_ms").and_then(Value::as_u64), Some(120), "post-text delay");
        assert_eq!(cmds[ti - 1].get("delay_ms").and_then(Value::as_u64), Some(120), "pre-text delay");
    }

    #[test]
    fn stash_precedes_the_submit() {


    #[test]
    fn every_key_command_is_preceded_by_a_settle_delay() {
        // F-019: a {key:*} that coalesces with the preceding {text} burst is literalized by CC's TUI
        // parser (enter->newline, ctrl+s swallowed). Every key MUST be separated from the prior write
        // by a {delay_ms} >= the coalesce threshold (120ms). Guards against a future refactor dropping
        // a delay and silently regressing submit/stash.
        let cmds = commands_for_event("payload");
        for (i, c) in cmds.iter().enumerate() {
            if c.get("key").is_some() {
                assert!(i > 0, "a key command cannot be first with nothing spacing it");
                let prev = &cmds[i - 1];
                let d = prev.get("delay_ms").and_then(Value::as_u64);
                assert!(
                    d.map(|d| d >= 120).unwrap_or(false),
                    "key command at {i} must be preceded by a >=120ms delay, got prev={prev}"
                );
            }
        }
    }

    #[test]
    fn stash_precedes_the_submit() {

    #[test]
    fn keys_and_text_are_never_adjacent_without_a_settle_delay() {
        // F-019: a {key:*} adjacent to the {text} burst coalesces and CC's ink TUI literalizes it
        // (enter->newline, ctrl+s swallowed). A {delay_ms} >= the 120ms coalesce threshold MUST sit
        // between the text and EACH key. Guards against a refactor dropping a delay and silently
        // regressing submit/stash back to the F-019 failure.
        let cmds = commands_for_event("payload");
        let is_text = |c: &Value| c.get("text").is_some();
        let is_key = |c: &Value| c.get("key").is_some();
        for w in cmds.windows(2) {
            let adjacent = (is_text(&w[0]) && is_key(&w[1])) || (is_key(&w[0]) && is_text(&w[1]));
            assert!(!adjacent, "text and key must not be adjacent (need a settle delay): {w:?}");
        }
        let ti = cmds.iter().position(is_text).unwrap();
        // The delay after the text (before the submit key) and before the text (after the stash key)
        // must both clear the coalesce threshold.
        assert_eq!(cmds[ti + 1].get("delay_ms").and_then(Value::as_u64), Some(120), "post-text delay");
        assert_eq!(cmds[ti - 1].get("delay_ms").and_then(Value::as_u64), Some(120), "pre-text delay");
    }

    #[test]
    fn stash_precedes_the_submit() {

-    fn every_key_command_is_preceded_by_a_settle_delay() {

-        // F-019: a {key:*} that coalesces with the preceding {text} burst is literalized by CC's TUI

-        // parser (enter->newline, ctrl+s swallowed). Every key MUST be separated from the prior write

-        // by a {delay_ms} >= the coalesce threshold (120ms). Guards against a future refactor dropping

-        // a delay and silently regressing submit/stash.

+    fn keys_and_text_are_never_adjacent_without_a_settle_delay() {

+        // F-019: a {key:*} adjacent to the {text} burst coalesces and CC's ink TUI literalizes it

+        // (enter->newline, ctrl+s swallowed). A {delay_ms} >= the 120ms coalesce threshold MUST sit

+        // between the text and EACH key. Guards against a refactor dropping a delay and silently

+        // regressing submit/stash back to the F-019 failure.

-        for (i, c) in cmds.iter().enumerate() {

-            if c.get("key").is_some() {

-                assert!(i > 0, "a key command cannot be first with nothing spacing it");

-                let prev = &cmds[i - 1];

-                let d = prev.get("delay_ms").and_then(Value::as_u64);

-                    d.map(|d| d >= 120).unwrap_or(false),

-                    "key command at {i} must be preceded by a >=120ms delay, got prev={prev}"

+        let is_text = |c: &Value| c.get("text").is_some();

+        let is_key = |c: &Value| c.get("key").is_some();

+            assert!(!adjacent, "text and key must not be adjacent (need a settle delay): {w:?}");

+        let ti = cmds.iter().position(is_text).unwrap();

+        // The delay after the text (before the submit key) and before the text (after the stash key)

+        // must both clear the coalesce threshold.

+        assert_eq!(cmds[ti + 1].get("delay_ms").and_then(Value::as_u64), Some(120), "post-text delay");

+        assert_eq!(cmds[ti - 1].get("delay_ms").and_then(Value::as_u64), Some(120), "pre-text delay");


Build + test:


Bash

cd /c/Users/decid/Documents/projects/spt-claude-code/tools/cc-spt-idle-translate && cargo test --release 2>&1 | grep -E "test result|error|warning: unused" | head

Build + test with 120ms


Command running in background with ID: bwfdajq9p. Output is being written to: C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-spt-claude-code\e2a44c8e-df24-4cba-8ede-fff02a618f5e\tasks\bwfdajq9p.output. You will be notified when it completes. To check interim output, use Read on that file path.


<task-notification>
<task-id>bwfdajq9p</task-id>
<tool-use-id>toolu_015boKdXBg9yvp1fEB92SKsG</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-spt-claude-code\e2a44c8e-df24-4cba-8ede-fff02a618f5e\tasks\bwfdajq9p.output</output-file>
<status>completed</status>
<summary>Background command "Build + test with 120ms" completed (exit code 0)</summary>
</task-notification>


While it builds, find the lightest way to respawn call-a's translate child (it's resident per-endpoint). Check daemon/endpoint bounce options:


echo "=== daemon ==="; spt daemon --help 2>&1 | head -20; echo; echo "=== endpoint ==="; spt endpoint --help 2>&1 | head -30

Daemon + endpoint lifecycle options


=== daemon ===
The per-machine daemon: run, stop, or read node status.

Bare spt daemon renders the node status view — daemon state, member subnets, local endpoints (M8
decision 25).

Usage: spt.exe daemon [COMMAND]

Commands:
  run     Run the per-machine daemon in the FOREGROUND — this process IS the daemon, blocking until
          signalled (the service unit's ExecStart, or manual debugging). Never detaches; for a
          background daemon use start
  start   Ensure the daemon is up in the background (idempotent, service-aware): a registered OS
          service is driven via its manager, else a detached daemon is spawned. Non-blocking
  stop    Stop the daemon (service-aware: a managed service is stopped via its manager so it does
          not auto-restart-fight; else a graceful IPC stop)
  status  Node status: daemon state, member subnets, local endpoints (the bare spt daemon view)
  help    Print this message or the help of the given subcommand(s)

Options:
  -h, --help

=== endpoint ===
Endpoint operations: list, lifecycle, fork, digest, access.

The noun home for per-endpoint verbs (M8 decision 1). Bare spt endpoint renders the merged listing
— every member subnet's endpoints grouped by subnet, this session's own endpoint pinned distinctly
at the top.

Usage: spt.exe endpoint [COMMAND]

Commands:
  list         Merged endpoint listing (the bare spt endpoint view)
  run          Bring up an spt-hosted harness endpoint into a broker-held PTY
  fork         Fork an endpoint into another subnet as a NEW identity
  suspend      Rest an endpoint cold (the suspend edge)
  wake         Wake a resting endpoint in place
  shutdown     Gracefully shut down an agent's own endpoint
  stop         Soft-stop a perch (spool preserved)
  rename       Rename an endpoint's logical id across its on-disk state
  purge        Permanently remove an endpoint and every record keyed on it
  digest       Show a session's live activity buffer (session digest)
  access       Endpoint access whitelist for unsolicited off-node inbound
  description  The endpoint's service-description blurb (ex-resources)
  role         Show or set the endpoint's durable role — a broad statement of purpose stored in
               the mind (tracked/agents/<id>/live-role.md), which replicates with the agent and
               renders FIRST at start-transition context injection. Bare role prints the current
               role; --overwrite <file> replaces it from a file. This is the sole writer of
               the role — no automated path (reconcile / echo-commune / signoff) ever mutates it
  help         Print this message or the help of the given subcommand(s)

Options:
  -h, --help


Prompt:
<task-notification>
<task-id>bwfdajq9p</task-id>
<tool-use-id>toolu_015boKdXBg9yvp1fEB92SKsG</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-spt-claude-code\e2a44c8e-df24-4cba-8ede-fff02a618f5e\tasks\bwfdajq9p.output</output-file>
<status>completed</status>
<summary>Background command "Build + test with 120ms" completed (exit code 0)</summary>
</task-notification>


Test result


test result: ok. 12 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s


12/12 pass. Deploy to install dir + test if respawn is even needed (a locked copy proves the child is resident):


SRC="tools/cc-spt-idle-translate/target/release/cc-spt-idle-translate.exe"; DST="C:/Users/decid/AppData/Local/spt-core/adapters/_github/SaberMage-spt-claude-code/cc-spt-idle-translate.exe"; cp "$SRC" "$DST" 2>&1 && echo "COPY OK (not locked)" || echo "COPY FAILED (likely locked by resident child)"

Hot-swap translate binary into install dir


COPY OK (not locked)


Not locked — copy succeeded. But a resident child still runs the OLD binary in memory; the swap only matters on next spawn. Test directly: send a probe — if it submits, spawn is per-delivery (new binary live); if it still newlines, the old child is resident and needs a respawn. Capture cleanly:


TS=$(ls -t "C:/Users/decid/.claude/projects/C--Users-decid-Documents-projects/"*.jsonl | head -1); echo "newest transcript: $TS"; echo "lines before: $(wc -l < "$TS")"; echo "$TS" > /tmp/cur_ts.txt

Find current transcript + baseline count


newest transcript: C:/Users/decid/.claude/projects/C--Users-decid-Documents-projects/a3150358-0e7a-43e5-9c55-2f403e9a9f89.jsonl
lines before: 74


sleep 1; printf '%s' "DIAG-PROBE-c3d0 delay120 test" | spt send call-a 2>&1; echo " sent"; sleep 6.5; TS=$(cat /tmp/cur_ts.txt); echo "lines after: $(wc -l < "$TS")"; echo "probe in transcript (any session): "; grep -l "DIAG-PROBE-c3d0" "C:/Users/decid/.claude/projects/C--Users-decid-Documents-projects/"*.jsonl 2>/dev/null || echo "none"

Send delay120 probe + check submit


SENT:call-a
 sent
lines after: 74
probe in transcript (any session):
none


[Resource link: Grid Image] capture://6a32b585-a0f4-4d78-83b7-3d49f8d6e19c/grid


[Resource from plugin:screen-timelapse:screen-timelapse at capture://6a32b585-a0f4-4d78-83b7-3d49f8d6e19c/grid] Binary content (image/jpeg, 94.8KB) saved to C:\Users\decid\.ccs\instances\bigscreen\projects\C--Users-decid-Documents-projects-spt-claude-code\f3e951d5-41f4-4edd-ad46-954e0391b455\tool-results\mcp-resource-1782215405073-0-wc01tx.jpg


Left frame: box was **cleared** (operator likely cleared the old drafts — now just `>`). Right frame: new probe typed in, **still newlines** (cursor dropped). But this likely ran the **old resident 50ms child** — the install-dir swap only affects the next spawn. Confirm whether the child is resident + its PID:


PowerShell

Get-CimInstance Win32_Process -Filter "Name='cc-spt-idle-translate.exe'" | Select-Object ProcessId, CreationDate, CommandLine | Format-List

Find resident translate child process


(PowerShell completed with no output)


No resident process — so it's spawned **per-delivery** and reaped. Meaning the last probe *did* run my new binary... yet still newlined. Before concluding 120ms is insufficient, verify the install-dir binary actually emits 120 (confirm my copy + build):


Bash

BIN="C:/Users/decid/AppData/Local/spt-core/adapters/_github/SaberMage-spt-claude-code/cc-spt-idle-translate.exe"; printf '%s\n%s\n' '{"type":"init","endpoint_id":"x","node":"y"}' '{"type":"event","envelope":"<EVENT>hi</EVENT>"}' | "$BIN" 2>&1

Verify installed binary emits delay 120


{"key":"ctrl+s"}
{"delay_ms":50}
{"text":"<EVENT>hi</EVENT>"}
{"delay_ms":50}
{"key":"enter"}
{"commit":true}


The installed binary **still emits delay 50** — my copy source (`target/release`) wasn't refreshed by `cargo test` (it builds a separate test artifact). So the last probe ran 50ms, not 120 — **120 is still untested.** Rebuild explicitly, verify, re-copy:


cd /c/Users/decid/Documents/projects/spt-claude-code/tools/cc-spt-idle-translate && cargo build --release 2>&1 | tail -2; echo "=== local emits ==="; printf '%s\n%s\n' '{"type":"init"}' '{"type":"event","envelope":"<EVENT>hi</EVENT>"}' | target/release/cc-spt-idle-translate.exe 2>&1 | grep delay

Explicit release build + verify local emits 120


   Compiling cc-spt-idle-translate v0.1.0 (C:\Users\decid\Documents\projects\spt-claude-code\tools\cc-spt-idle-translate)
    Finished `release` profile [optimized] target(s) in 0.41s
=== local emits ===
{"delay_ms":120}
{"delay_ms":120}


Local now emits 120. Deploy + verify installed:


SRC="tools/cc-spt-idle-translate/target/release/cc-spt-idle-translate.exe"; DST="C:/Users/decid/AppData/Local/spt-core/adapters/_github/SaberMage-spt-claude-code/cc-spt-idle-translate.exe"; cp "$SRC" "$DST" && echo "copied"; echo "=== installed emits ==="; printf '%s\n%s\n' '{"type":"init"}' '{"type":"event","envelope":"<EVENT>hi</EVENT>"}' | "$DST" 2>&1 | grep delay

Copy + verify installed emits 120


cp: cannot stat 'tools/cc-spt-idle-translate/target/release/cc-spt-idle-translate.exe': No such file or directory
=== installed emits ===
{"delay_ms":50}
{"delay_ms":50}


Path issue — use absolute:


SRC="C:/Users/decid/Documents/projects/spt-claude-code/tools/cc-spt-idle-translate/target/release/cc-spt-idle-translate.exe"; DST="C:/Users/decid/AppData/Local/spt-core/adapters/_github/SaberMage-spt-claude-code/cc-spt-idle-translate.exe"; ls -la "$SRC" && cp "$SRC" "$DST" && echo "copied"; echo "=== installed emits ==="; printf '%s\n%s\n' '{"type":"init"}' '{"type":"event","envelope":"<EVENT>hi</EVENT>"}' | "$DST" 2>&1 | grep delay

Copy with absolute paths + verify


-rwxr-xr-x 2 decid 197609 221696 Jun 23 04:51 C:/Users/decid/Documents/projects/spt-claude-code/tools/cc-spt-idle-translate/target/release/cc-spt-idle-translate.exe
copied
=== installed emits ===
{"delay_ms":120}
{"delay_ms":120}


Installed emits 120; per-delivery spawn means the next send uses it. Test 120ms — capture + transcript:


sleep 1; printf '%s' "DIAG-PROBE-d4e1 delay120 REAL test" | spt send call-a 2>&1; echo " sent"; sleep 6.5; echo "probe submitted to any transcript?:"; grep -l "DIAG-PROBE-d4e1" "C:/Users/decid/.claude/projects/C--Users-decid-Documents-projects/"*.jsonl 2>/dev/null || echo "NOT in any transcript (not submitted)"

Send 120ms probe + check submit


SENT:call-a
 sent
probe submitted to any transcript?:
NOT in any transcript (not submitted)


[Resource link: Grid Image] capture://cb00a4f8-3d8c-40fd-8e8b-878d6be664d4/grid


[Resource from plugin:screen-timelapse:screen-timelapse at capture://cb00a4f8-3d8c-40fd-8e8b-878d6be664d4/grid] Binary content (image/jpeg, 98.3KB) saved to C:\Users\decid\.ccs\instances\bigscreen\projects\C--Users-decid-Documents-projects-spt-claude-code\f3e951d5-41f4-4edd-ad46-954e0391b455\tool-results\mcp-resource-1782215526411-0-jv7no1.jpg


120ms still fails — d4e1 stacked below c3d0, still newlines, ctrl+s still no-op. Climb to doyle's upper bound (300) to confirm delay alone fixes it, then bisect for the lowest. Edit const + fast rebuild (skip tests during iteration):


/// one fast burst, and Claude Code's ink/React-TUI parser literalizes the whole burst — `\r` lands as

/// a newline-in-box (no submit) and `ctrl+s` (0x13) is swallowed (no stash). 50ms was below CC's

/// coalesce threshold (F-019); 120ms clears it (doyle 2026-06-23, lowest value confirmed live).

/// Build the keystroke-command sequence for one inbound EVENT envelope.


cargo build --release 2>&1 | tail -1; DST="C:/Users/decid/AppData/Local/spt-core/adapters/_github/SaberMage-spt-claude-code/cc-spt-idle-translate.exe"; cp target/release/cc-spt-idle-translate.exe "$DST" && printf '%s\n%s\n' '{"type":"init"}' '{"type":"event","envelope":"<EVENT>hi</EVENT>"}' | "$DST" 2>&1 | grep delay

Build+deploy 300ms, verify installed


    Finished `release` profile [optimized] target(s) in 0.43s
{"delay_ms":300}
{"delay_ms":300}


300ms deployed. Test:


sleep 1; printf '%s' "DIAG-PROBE-e5f2 delay300 test" | spt send call-a 2>&1; echo " sent"; sleep 7.5; echo "submitted?:"; grep -l "DIAG-PROBE-e5f2" "C:/Users/decid/.claude/projects/C--Users-decid-Documents-projects/"*.jsonl 2>/dev/null || echo "NOT submitted"

Send 300ms probe + check submit


SENT:call-a
 sent
submitted?:
NOT submitted


[Resource link: Grid Image] capture://f2c93f96-b257-4663-985d-2e0f5acea3c7/grid


[Resource from plugin:screen-timelapse:screen-timelapse at capture://f2c93f96-b257-4663-985d-2e0f5acea3c7/grid] Binary content (image/jpeg, 106KB) saved to C:\Users\decid\.ccs\instances\bigscreen\projects\C--Users-decid-Documents-projects-spt-claude-code\f3e951d5-41f4-4edd-ad46-954e0391b455\tool-results\mcp-resource-1782215593468-0-z7bkob.jpg


300ms **still fails** — three envelopes now stacked, none submitted, ctrl+s never stashed. This is doyle's stated escalation point ("if 300ms-spaced `\r` won't submit, deeper dig"). Delay is clearly **not** the (only) cause.

New leading hypothesis: a raw `\r` (0x0D), however spaced, lands as newline — possibly the broker PTY's line discipline translates CR or CC submits on **LF (`\n`)**, not CR. One decisive test before escalating: inject `\n` as the submit instead of `\r`. Swap `{key:enter}` → `{text:"\n"}` (keep 300ms):


Edit

        json!({ "delay_ms": DELAY_MS }), // 4. let the text land in CC's input box before the submit key
        json!({ "key": "enter" }),       // 5. submit — a real Enter keypress (CC needs the key event, not a \r byte)

        json!({ "delay_ms": DELAY_MS }), // 4. let the text land in CC's input box before the submit key
        json!({ "text": "\n" }),         // 5. DIAG: submit via raw LF (0x0A) instead of {key:enter}==\r


        json!({ "delay_ms": DELAY_MS }), // 4. let the text land in CC's input box before the submit key
        json!({ "key": "enter" }),       // 5. submit — a real Enter keypress (CC needs the key event, not a \r byte)

        json!({ "delay_ms": DELAY_MS }), // 4. let the text land in CC's input box before the submit key
        json!({ "text": "\n" }),         // 5. DIAG: submit via raw LF (0x0A) instead of {key:enter}==\r

json!({ "delay_ms": DELAY_MS }), // 2. let the stash settle

json!({ "text": sanitized }),    // 3. type the envelope — NO trailing CR (a \r byte does not submit CC)

-        json!({ "key": "enter" }),       // 5. submit — a real Enter keypress (CC needs the key event, not a \r byte)

+        json!({ "text": "\n" }),         // 5. DIAG: submit via raw LF (0x0A) instead of {key:enter}==\r

json!({ "commit": true }),       // 6. terminate the inject sequence (release the InjectFloor)


Bash

cargo build --release 2>&1 | tail -1; DST="C:/Users/decid/AppData/Local/spt-core/adapters/_github/SaberMage-spt-claude-code/cc-spt-idle-translate.exe"; cp target/release/cc-spt-idle-translate.exe "$DST" && echo "deployed"; printf '%s\n%s\n' '{"type":"init"}' '{"type":"event","envelope":"<EVENT>hi</EVENT>"}' | "$DST" 2>&1

Build+deploy LF-submit variant


    Finished `release` profile [optimized] target(s) in 0.42s
deployed
{"key":"ctrl+s"}
{"delay_ms":300}
{"text":"<EVENT>hi</EVENT>"}
{"delay_ms":300}
{"text":"\n"}
{"commit":true}


sleep 1; printf '%s' "DIAG-PROBE-f6a3 LF submit test" | spt send call-a 2>&1; echo " sent"; sleep 7.5; echo "submitted?:"; grep -l "DIAG-PROBE-f6a3" "C:/Users/decid/.claude/projects/C--Users-decid-Documents-projects/"*.jsonl 2>/dev/null || echo "NOT submitted"

Send LF-submit probe + check


[Resource link: Grid Image] capture://a1a82a15-0d4b-4f44-9dd3-a021112f74cb/grid


[Resource from plugin:screen-timelapse:screen-timelapse at capture://a1a82a15-0d4b-4f44-9dd3-a021112f74cb/grid] Binary content (image/jpeg, 110KB) saved to C:\Users\decid\.ccs\instances\bigscreen\projects\C--Users-decid-Documents-projects-spt-claude-code\f3e951d5-41f4-4edd-ad46-954e0391b455\tool-results\mcp-resource-1782215679042-0-6e3233.jpg


**Critical result: `\n` (LF) ALSO newlines** — f6a3 stacked, no submit. So **both CR and LF insert newlines; neither submits.** Combined with ctrl+s dead at every delay and 120/300ms making no difference, this is past delay-tuning and past CR-vs-LF.

Strong new hypothesis: **CC v2.1.186 negotiates an enhanced keyboard protocol (kitty/CSI-u)**, where Enter is reported as an escape sequence (`ESC[13u`), and bare `\r`/`\n` are treated as literal newline insertion. Cheap decisive test — emit the kitty-protocol Enter `ESC[13u`:


Edit

json!({ "text": "\n" }),         // 5. DIAG: submit via raw LF (0x0A) instead of {key:enter}==\r

json!({ "text": "\u{1b}[13u" }), // 5. DIAG: submit via kitty/CSI-u Enter (ESC[13u)


-        json!({ "text": "\n" }),         // 5. DIAG: submit via raw LF (0x0A) instead of {key:enter}==\r

+        json!({ "text": "\u{1b}[13u" }), // 5. DIAG: submit via kitty/CSI-u Enter (ESC[13u)


Bash

cargo build --release 2>&1 | tail -1; DST="C:/Users/decid/AppData/Local/spt-core/adapters/_github/SaberMage-spt-claude-code/cc-spt-idle-translate.exe"; cp target/release/cc-spt-idle-translate.exe "$DST" && echo deployed; printf '%s\n%s\n' '{"type":"init"}' '{"type":"event","envelope":"<EVENT>hi</EVENT>"}' | "$DST" 2>&1 | sed -n '5p' | xxd | head -2

Build+deploy CSI-u enter, verify bytes


    Finished `release` profile [optimized] target(s) in 0.43s
deployed
00000000: 7b22 7465 7874 223a 225c 7530 3031 625b  {"text":"\u001b[
00000010: 3133 7522 7d0a                           13u"}.


CSI-u Enter deployed (broker JSON-decodes `\u001b`→0x1b before writing). Test:


sleep 1; printf '%s' "DIAG-PROBE-a7b4 CSIu enter test" | spt send call-a 2>&1; echo " sent"; sleep 7.5; echo "submitted?:"; grep -l "DIAG-PROBE-a7b4" "C:/Users/decid/.claude/projects/C--Users-decid-Documents-projects/"*.jsonl 2>/dev/null || echo "NOT submitted"

Send CSI-u enter probe + check


[Resource link: Grid Image] capture://f4f851d4-96d1-4913-a23a-42300d26ca49/grid


[Resource from plugin:screen-timelapse:screen-timelapse at capture://f4f851d4-96d1-4913-a23a-42300d26ca49/grid] Binary content (image/jpeg, 114KB) saved to C:\Users\decid\.ccs\instances\bigscreen\projects\C--Users-decid-Documents-projects-spt-claude-code\f3e951d5-41f4-4edd-ad46-954e0391b455\tool-results\mcp-resource-1782215755666-0-hxnn0z.jpg


**CSI-u Enter also fails** — a7b4 stacked (5 envelopes now), no submit. So the full matrix:

| submit attempt | delay | result |
|---|---|---|
| `{key:enter}` (`\r` 0x0D) | 50 / 120 / 300 | newline, no submit |
| `{text:"\n"}` (LF 0x0A) | 300 | newline, no submit |
| `{text:"\x1b[13u"}` (kitty Enter) | 300 | newline/no-op, no submit |
| `{key:ctrl+s}` (0x13) | 50–300 | never stashes |

**No injected byte/sequence submits CC v2.1.186 over the broker PTY.** doyle's coalesce-delay theory is disproven (300ms no help); CR/LF/CSI-u all fail; ctrl+s dead. This is the deeper dig — spt-core broker-internals (why does a real operator Enter submit but injected bytes never do?).

Restore the install-dir binary to the published v0.6.2 (clean known state) before escalating — revert my diagnostic edits:


cd /c/Users/decid/Documents/projects/spt-claude-code && git checkout tools/cc-spt-idle-translate/src/main.rs && cd tools/cc-spt-idle-translate && cargo build --release 2>&1 | tail -1; DST="C:/Users/decid/AppData/Local/spt-core/adapters/_github/SaberMage-spt-claude-code/cc-spt-idle-translate.exe"; cp target/release/cc-spt-idle-translate.exe "$DST" && echo "restored to v0.6.2"; printf '%s\n%s\n' '{"type":"init"}' '{"type":"event","envelope":"<EVENT>hi</EVENT>"}' | "$DST" 2>&1 | grep -E "delay|key|text"

Revert diagnostic edits + restore install-dir binary to v0.6.2


Updated 1 path from the index
    Finished `release` profile [optimized] target(s) in 0.43s
restored to v0.6.2
{"key":"ctrl+s"}
{"delay_ms":50}
{"text":"<EVENT>hi</EVENT>"}
{"delay_ms":50}
{"key":"enter"}


1	//! cc-spt-idle-translate — the `[message-idle-translation-binary]` for the claude-spt adapter
2	//! (spt-core harness-contract v0.13.0+).
3	//!
4	//! A lifecycle-managed `stdin -> stdout` JSON-lines filter. spt-core spawns it when the spt-hosted
5	//! endpoint comes online and reaps it on shutdown; it turns each inbound `<EVENT>` envelope into a
6	//! sequence of keystroke-commands that spt-core applies ATOMICALLY to the broker-held PTY (live
7	//! operator input is buffered during emission, so it coexists with an attached `spt rc` controller).
8	//! Scope is IDLE delivery only — busy/mid-turn injection stays the adapter's `[inject]` hook path.
9	//!
10	//! Input protocol (stdin, one JSON object per line):
11	//!   {"type":"init","endpoint_id":…,"node":…}   — first message (handshake; no output)
12	//!   {"type":"event","envelope":"<EVENT…>"}      — one inbound message; the full EVENT envelope
13	//!   {"type":"input"}                            — content-free ping when the operator types (no output)
14	//!
15	//! Output protocol (stdout, one JSON object per line):
16	//!   {"key":"ctrl+s"}     — keystroke command (Claude Code: STASH the current draft input)
17	//!   {"key":"enter"}      — keystroke command (submit the PTY line; see SUBMIT note below)
18	//!   {"delay_ms":50}      — inter-command pause
19	//!   {"text":"<payload>"} — text injection (the envelope; NO trailing \r — it does not submit CC)
20	//!   {"commit":true}      — MANDATORY sequence terminator (release the InjectFloor; see below)
21	//!
22	//! The per-event choreography delivers the message WITHOUT clobbering a half-typed draft the operator
23	//! may have in the input box, then terminates the inject sequence:
24	//!   1. ctrl+s              stash any existing draft
25	//!   2. delay 50ms          let the stash settle
26	//!   3. <envelope>          type the envelope (no trailing CR)
27	//!   4. delay 50ms          let the text land in CC's input box before the submit key
28	//!   5. {"key":"enter"}     submit the line
29	//!   6. {"commit":true}     terminate the inject sequence
30	//! No trailing restore keystroke: Claude Code AUTO-RESTORES the stashed draft after the submit, so a
31	//! second ctrl+s would be redundant (it would re-stash, not restore).
32	//!
33	//! SUBMIT IS A REAL ENTER KEY, NOT A TRAILING `\r` (corrected 2026-06-23): we previously rode the
34	//! submit IN the text as a trailing `\r`, on the assumption that spt-core applies `{"text"}` VERBATIM
35	//! to the PTY (broker.rs:1066, :1016-1017) and a `\r` byte == `{"key":"enter"}`
36	//! (`key_to_bytes("enter")->b"\r"`). Empirically that is NOT enough: a `\r` byte in injected text does
37	//! NOT trigger Claude Code's message submission — CC needs the discrete Enter KEY event. So step 5 is
38	//! now a separate `{"key":"enter"}` after the text lands. The verbatim-text application still REQUIRES
39	//! `commands_for_event` to neutralize the envelope's INTERNAL CR/LF (an un-neutralized `\n`/`\r` would
40	//! reach the PTY and could split or corrupt the injection) — only the discrete Enter submits.
41	//!
42	//! TWO DISTINCT SIGNALS — do not conflate them:
43	//!  - The `{"key":"enter"}` in step 5 is the HARNESS-level submit (the discrete keypress CC needs).
44	//!  - The `{"commit":true}` in step 6 is the PROTOCOL-level terminator: `run_inject_worker`
45	//!    (broker.rs:1075-1090) ends an inject sequence ONLY on an explicit `{commit}`. Text/Key/Delay
46	//!    just enqueue; a sequence that emits no `{commit}` hits `INJECT_COMMIT_DEADLINE` (5s,
47	//!    broker.rs:151-169) and FAULTS on every delivery (reverts to raw inject — input isn't lost but
48	//!    each delivery stalls to the deadline). `{commit}` flushes the live controller's buffered input
49	//!    and releases the InjectFloor race-free. Enter submits the line; `{commit}` ends the sequence.
50	//!
51	//! Degenerate fallback (per the published contract): `{"text":payload}{"key":"enter"}{"commit":true}`
52	//! with no choreography — even the bare form MUST commit. (The published manifest doc ORIGINALLY
53	//! omitted `{commit}` from the vocabulary and its degenerate example — a public-surface defect this
54	//! adapter's blind-build caught, logged F-016. The contract is now CORRECTED + live:
55	//! harness-contract/manifest.html documents `{commit}` as the mandatory terminator + the 5s
56	//! commit-deadline + inject-floor release + raw-inject fallback, since v0.13.0.)
57	//! We choreograph because Claude Code's input box supports the ctrl+s draft stash/restore, so an
58	//! inbound message never eats an in-progress draft.
59	//!
60	//! Robustness: this is lifecycle-critical — a panic would drop the idle-delivery pipe for the whole
61	//! session. Malformed lines and unknown `type`s degrade gracefully (skipped, never fatal); unknown
62	//! JSON fields are ignored (forward-compat with newer spt-core). [impl->REQ-DIST-IDLE-TRANSLATE]
63
64	use serde_json::{json, Value};
65	use std::io::{self, BufRead, Write};
66
67	/// Inter-command pause spt-core honors between emitted keystroke/text commands (operator spec).
68	const DELAY_MS: u64 = 50;
69
70	/// Build the keystroke-command sequence for one inbound EVENT envelope.
71	///
72	/// `envelope` is the full `<EVENT…>…</EVENT>` string. The envelope is single-line by contract (it
73	/// encodes newlines as the literal `<br>` token), but we defensively strip any raw CR/LF so a stray
74	/// newline can never split or corrupt the injection. (Necessary because spt-core applies `{"text"}`
75	/// verbatim — broker.rs:1066/:1016-1017, doyle 2026-06-20 — so any internal CR/LF would otherwise
76	/// reach the PTY.) The submit is a DISCRETE `{"key":"enter"}` AFTER the text — a trailing `\r` byte in
77	/// the text does NOT submit a Claude Code message (corrected 2026-06-23). The closing `{"commit"}`
78	/// is the MANDATORY inject-sequence terminator (broker.rs:1075-1090; no-commit FAULTs at the 5s
79	/// INJECT_COMMIT_DEADLINE). [impl->REQ-DIST-IDLE-TRANSLATE]
80	fn commands_for_event(envelope: &str) -> Vec<Value> {
81	    let sanitized: String = envelope
82	        .chars()
83	        .map(|c| if c == '\r' || c == '\n' { ' ' } else { c })
84	        .collect();
85	    vec![
86	        json!({ "key": "ctrl+s" }),      // 1. stash any existing draft
87	        json!({ "delay_ms": DELAY_MS }), // 2. let the stash settle
88	        json!({ "text": sanitized }),    // 3. type the envelope — NO trailing CR (a \r byte does not submit CC)
89	        json!({ "delay_ms": DELAY_MS }), // 4. let the text land in CC's input box before the submit key
90	        json!({ "key": "enter" }),       // 5. submit — a real Enter keypress (CC needs the key event, not a \r byte)
91	        json!({ "commit": true }),       // 6. terminate the inject sequence (release the InjectFloor)
92	    ]
93	}
94
95	/// Dispatch one parsed input line to its output commands. `init`/`input` (and any unknown `type`)
96	/// produce nothing; only `event` emits the choreography. Returns an empty vec for no-output lines.
97	fn commands_for_line(v: &Value) -> Vec<Value> {
98	    match v.get("type").and_then(Value::as_str) {
99	        Some("event") => match v.get("envelope").and_then(Value::as_str) {
100	            Some(env) => commands_for_event(env),
101	            None => Vec::new(), // event without an envelope: nothing to deliver
102	        },
103	        // "init" handshake, "input" operator-typing ping, or any unknown type: no output.
104	        _ => Vec::new(),
105	    }
106	}
107
108	fn main() {
109	    let stdin = io::stdin();
110	    let stdout = io::stdout();
111	    let mut out = stdout.lock();
112
113	    for line in stdin.lock().lines() {
114	        let line = match line {
115	            Ok(l) => l,
116	            Err(_) => break, // stdin closed/errored: spt-core is tearing us down.
117	        };
118	        let trimmed = line.trim();
119	        if trimmed.is_empty() {
120	            continue;
121	        }
122	        let v: Value = match serde_json::from_str(trimmed) {
123	            Ok(v) => v,
124	            Err(e) => {

... [159 lines truncated] ...


Restored to published v0.6.2. Now update F-019 with the full empirical matrix + escalation, then send doyle. Read current F-019 status section:


grep -n "F-019\|^**Status" docs/SPT-CORE-FINDINGS.md | tail -5

Find F-019 location


grep: docs/SPT-CORE-FINDINGS.md: No such file or directory


1052
1053	**Status:** **OPEN — reported to doyle (2026-06-23), spt-core/broker fix required.** Root cause is in
1054	spt-core's keystroke-command → PTY delivery (and the contract's submit documentation), not in
1055	`claude-spt`. Repro is deterministic (`spt send call-a` → envelope stacks unsent in CC's input box;
1056	verifiable by screen capture / by the transcript not gaining a user turn). Awaiting doyle's
1057	confirmation of the bracketed-paste mechanism and the corrected submit avenue.
1058

**Status:** **OPEN — reported to doyle (2026-06-23), spt-core/broker fix required.** Root cause is in
spt-core's keystroke-command → PTY delivery (and the contract's submit documentation), not in
`claude-spt`. Repro is deterministic (`spt send call-a` → envelope stacks unsent in CC's input box;
verifiable by screen capture / by the transcript not gaining a user turn). Awaiting doyle's
confirmation of the bracketed-paste mechanism and the corrected submit avenue.


Edit

**Status:** **OPEN — reported to doyle (2026-06-23), spt-core/broker fix required.** Root cause is in
spt-core's keystroke-command → PTY delivery (and the contract's submit documentation), not in
`claude-spt`. Repro is deterministic (`spt send call-a` → envelope stacks unsent in CC's input box;
verifiable by screen capture / by the transcript not gaining a user turn). Awaiting doyle's
confirmation of the bracketed-paste mechanism and the corrected submit avenue.

**doyle's first answer (2026-06-23) — bracketed-paste DISPROVEN; coalesce-delay theory.** doyle read
the inject path: NO bracketed-paste wrapping (broker.rs:1131-1138 — `{text}`/`{key}` both enqueue raw
to one per-session FIFO, zero `ESC[200~`; bracketing exists only on the `rc` Windows-clipboard path).
The `ctrl+s` (0x13) failure rules out a CR-vs-LF issue. His theory: `{key:*}` bytes reach the PTY but
**coalesce** with the preceding `{text}` into one fast burst; CC's ink/React-TUI parser literalizes
the burst (`\r`→newline, 0x13 swallowed). Proposed adapter fix: insert `{delay_ms}` between `{text}`
and each `{key}` (the broker `thread::sleep`s on it, broker.rs:1139, physically spacing PTY writes) —
try 120ms, climb 200/300; *"if a 300ms-spaced `\r` still won't submit, escalate — deeper dig."*

**Empirically tested live against call-a (real CC v2.1.186), screen-captured each — the delay theory
DOES NOT HOLD:**

| submit attempt | delay between text & submit | result |
| --- | --- | --- |
| `{key:enter}` (`\r`, 0x0D) | 50ms (v0.6.2) | newline in box, no submit |
| `{key:enter}` (`\r`) | 120ms | newline, no submit |
| `{key:enter}` (`\r`) | 300ms | newline, no submit |
| `{text:"\n"}` (LF, 0x0A) | 300ms | newline, no submit |
| `{text:"\x1b[13u"}` (kitty/CSI-u Enter) | 300ms | newline/no-op, no submit |
| `{key:ctrl+s}` (0x13, stash) | 50–300ms | never stashes (drafts keep stacking) |

So: **300ms behaves identically to 50ms** (the delay is not the variable), and **CR, LF, and CSI-u
Enter all insert a newline rather than submit** — while `ctrl+s` never stashes at any delay. Test rig:
hot-swap the install-dir binary (per-delivery spawn — no resident child, verified via process list, so
each `spt send` picks up the new binary), `spt send call-a <probe>`, screen-capture the input box +
grep the transcript for the probe (absent = not submitted). Every probe stacked as an unsent draft.

**This is the "deeper dig" doyle named.** The coalesce-delay hypothesis is disproven. Open questions
for doyle: (1) are the `{delay_ms}` actually spacing the PTY writes in real time, or is the sequence
batched (the module-doc/contract word is *"applied ATOMICALLY"*)? 300ms ≡ 50ms suggests the delay
isn't taking effect, OR timing is simply not the cause. (2) How does a REAL operator Enter submit
(it does) when no injected byte/sequence (CR/LF/CSI-u) does — i.e., what does the broker's PTY-write
path NOT reproduce about a genuine keypress (raw-mode termios? an enhanced-keyboard handshake CC
negotiated that the injection bypasses)? (3) Is there ANY injected sequence that submits CC v2.1.186?

**Status:** **OPEN — escalated to doyle (2026-06-23) with the full matrix.** No adapter-side value
(delay, key shape, CR/LF/CSI-u) submits CC v2.1.186; the fix is in spt-core's broker PTY-write /
keystroke-delivery path (and the contract's submit documentation). `claude-spt` remains at the
published v0.6.2 (contract-correct `{text}{key:enter}{commit}` — becomes correct the moment the broker
can deliver a real submit). Repro is deterministic and screen-verifiable.


The file C:\Users\decid\Documents\projects\spt-claude-code\docs\SPT-CORE-FINDINGS.md has been updated successfully. (file state is current in your context — no need to Read it back)

**Status:** **OPEN — reported to doyle (2026-06-23), spt-core/broker fix required.** Root cause is in
spt-core's keystroke-command → PTY delivery (and the contract's submit documentation), not in
`claude-spt`. Repro is deterministic (`spt send call-a` → envelope stacks unsent in CC's input box;
verifiable by screen capture / by the transcript not gaining a user turn). Awaiting doyle's
confirmation of the bracketed-paste mechanism and the corrected submit avenue.

**doyle's first answer (2026-06-23) — bracketed-paste DISPROVEN; coalesce-delay theory.** doyle read
the inject path: NO bracketed-paste wrapping (broker.rs:1131-1138 — `{text}`/`{key}` both enqueue raw
to one per-session FIFO, zero `ESC[200~`; bracketing exists only on the `rc` Windows-clipboard path).
The `ctrl+s` (0x13) failure rules out a CR-vs-LF issue. His theory: `{key:*}` bytes reach the PTY but
**coalesce** with the preceding `{text}` into one fast burst; CC's ink/React-TUI parser literalizes
the burst (`\r`→newline, 0x13 swallowed). Proposed adapter fix: insert `{delay_ms}` between `{text}`
and each `{key}` (the broker `thread::sleep`s on it, broker.rs:1139, physically spacing PTY writes) —
try 120ms, climb 200/300; *"if a 300ms-spaced `\r` still won't submit, escalate — deeper dig."*

**Empirically tested live against call-a (real CC v2.1.186), screen-captured each — the delay theory
DOES NOT HOLD:**

| submit attempt | delay between text & submit | result |
| --- | --- | --- |
| `{key:enter}` (`\r`, 0x0D) | 50ms (v0.6.2) | newline in box, no submit |
| `{key:enter}` (`\r`) | 120ms | newline, no submit |
| `{key:enter}` (`\r`) | 300ms | newline, no submit |
| `{text:"\n"}` (LF, 0x0A) | 300ms | newline, no submit |
| `{text:"\x1b[13u"}` (kitty/CSI-u Enter) | 300ms | newline/no-op, no submit |
| `{key:ctrl+s}` (0x13, stash) | 50–300ms | never stashes (drafts keep stacking) |

So: **300ms behaves identically to 50ms** (the delay is not the variable), and **CR, LF, and CSI-u
Enter all insert a newline rather than submit** — while `ctrl+s` never stashes at any delay. Test rig:
hot-swap the install-dir binary (per-delivery spawn — no resident child, verified via process list, so
each `spt send` picks up the new binary), `spt send call-a <probe>`, screen-capture the input box +
grep the transcript for the probe (absent = not submitted). Every probe stacked as an unsent draft.

**This is the "deeper dig" doyle named.** The coalesce-delay hypothesis is disproven. Open questions
for doyle: (1) are the `{delay_ms}` actually spacing the PTY writes in real time, or is the sequence
batched (the module-doc/contract word is *"applied ATOMICALLY"*)? 300ms ≡ 50ms suggests the delay
isn't taking effect, OR timing is simply not the cause. (2) How does a REAL operator Enter submit
(it does) when no injected byte/sequence (CR/LF/CSI-u) does — i.e., what does the broker's PTY-write
path NOT reproduce about a genuine keypress (raw-mode termios? an enhanced-keyboard handshake CC
negotiated that the injection bypasses)? (3) Is there ANY injected sequence that submits CC v2.1.186?

**Status:** **OPEN — escalated to doyle (2026-06-23) with the full matrix.** No adapter-side value
(delay, key shape, CR/LF/CSI-u) submits CC v2.1.186; the fix is in spt-core's broker PTY-write /
keystroke-delivery path (and the contract's submit documentation). `claude-spt` remains at the
published v0.6.2 (contract-correct `{text}{key:enter}{commit}` — becomes correct the moment the broker
can deliver a real submit). Repro is deterministic and screen-verifiable.

`{text}{key:enter}{commit}` degenerate form, which becomes correct the moment the broker delivers

`{key:enter}` as a real Enter); the symptom resolution is **doyle's court**.

-**Status:** **OPEN — reported to doyle (2026-06-23), spt-core/broker fix required.** Root cause is in

-spt-core's keystroke-command → PTY delivery (and the contract's submit documentation), not in

-`claude-spt`. Repro is deterministic (`spt send call-a` → envelope stacks unsent in CC's input box;

-verifiable by screen capture / by the transcript not gaining a user turn). Awaiting doyle's

-confirmation of the bracketed-paste mechanism and the corrected submit avenue.

+**doyle's first answer (2026-06-23) — bracketed-paste DISPROVEN; coalesce-delay theory.** doyle read

+the inject path: NO bracketed-paste wrapping (broker.rs:1131-1138 — `{text}`/`{key}` both enqueue raw

+to one per-session FIFO, zero `ESC[200~`; bracketing exists only on the `rc` Windows-clipboard path).

+The `ctrl+s` (0x13) failure rules out a CR-vs-LF issue. His theory: `{key:*}` bytes reach the PTY but

+**coalesce** with the preceding `{text}` into one fast burst; CC's ink/React-TUI parser literalizes

+the burst (`\r`→newline, 0x13 swallowed). Proposed adapter fix: insert `{delay_ms}` between `{text}`

+and each `{key}` (the broker `thread::sleep`s on it, broker.rs:1139, physically spacing PTY writes) —

+try 120ms, climb 200/300; *"if a 300ms-spaced `\r` still won't submit, escalate — deeper dig."*

+**Empirically tested live against call-a (real CC v2.1.186), screen-captured each — the delay theory

+| submit attempt | delay between text & submit | result |

+| `{key:enter}` (`\r`, 0x0D) | 50ms (v0.6.2) | newline in box, no submit |

+| `{key:enter}` (`\r`) | 120ms | newline, no submit |

+| `{key:enter}` (`\r`) | 300ms | newline, no submit |

+| `{text:"\n"}` (LF, 0x0A) | 300ms | newline, no submit |

+| `{text:"\x1b[13u"}` (kitty/CSI-u Enter) | 300ms | newline/no-op, no submit |

+| `{key:ctrl+s}` (0x13, stash) | 50–300ms | never stashes (drafts keep stacking) |

+So: **300ms behaves identically to 50ms** (the delay is not the variable), and **CR, LF, and CSI-u

+Enter all insert a newline rather than submit** — while `ctrl+s` never stashes at any delay. Test rig:

+hot-swap the install-dir binary (per-delivery spawn — no resident child, verified via process list, so

+each `spt send` picks up the new binary), `spt send call-a <probe>`, screen-capture the input box +

+grep the transcript for the probe (absent = not submitted). Every probe stacked as an unsent draft.

+**This is the "deeper dig" doyle named.** The coalesce-delay hypothesis is disproven. Open questions

+for doyle: (1) are the `{delay_ms}` actually spacing the PTY writes in real time, or is the sequence

+batched (the module-doc/contract word is *"applied ATOMICALLY"*)? 300ms ≡ 50ms suggests the delay

+isn't taking effect, OR timing is simply not the cause. (2) How does a REAL operator Enter submit

+(it does) when no injected byte/sequence (CR/LF/CSI-u) does — i.e., what does the broker's PTY-write

+path NOT reproduce about a genuine keypress (raw-mode termios? an enhanced-keyboard handshake CC

+negotiated that the injection bypasses)? (3) Is there ANY injected sequence that submits CC v2.1.186?

+**Status:** **OPEN — escalated to doyle (2026-06-23) with the full matrix.** No adapter-side value

+(delay, key shape, CR/LF/CSI-u) submits CC v2.1.186; the fix is in spt-core's broker PTY-write /

+keystroke-delivery path (and the contract's submit documentation). `claude-spt` remains at the

+published v0.6.2 (contract-correct `{text}{key:enter}{commit}` — becomes correct the moment the broker

+can deliver a real submit). Repro is deterministic and screen-verifiable.


Send doyle the empirical results + sharp questions:


Bash

printf '%s' 'F-019 RESULT — your coalesce-delay theory tested live against call-a (real CC v2.1.186), screen-captured each probe. IT DOES NOT HOLD. Matrix (delay = gap between {text} and submit):
- {key:enter} (\r) @ 50ms  -> newline, no submit
- {key:enter} (\r) @ 120ms -> newline, no submit
- {key:enter} (\r) @ 300ms -> newline, no submit
- {text:"\n"} (LF 0x0A) @ 300ms -> newline, no submit
- {text:"\x1b[13u"} (kitty/CSI-u Enter) @ 300ms -> newline/no-op, no submit
- {key:ctrl+s} (0x13) @ 50-300ms -> NEVER stashes (drafts keep stacking)
So 300ms behaves IDENTICALLY to 50ms (delay is not the variable), and CR + LF + CSI-u Enter ALL insert a newline instead of submitting; ctrl+s never stashes at any delay. Test rig: per-delivery spawn (no resident child, verified by process list), hot-swap install-dir binary, spt send, screen-capture + transcript grep. This is your "escalate / deeper dig" point. Sharp questions: (1) Are {delay_ms} ACTUALLY spacing the PTY writes in real time, or is the inject sequence batched/written-at-once? The module doc + contract say the sequence is "applied ATOMICALLY" — 300ms==50ms strongly suggests the sleep is NOT spacing the writes (or timing is irrelevant). (2) A REAL operator Enter submits, but NO injected byte (CR/LF/CSI-u) does — what does the broker PTY-write path fail to reproduce vs a genuine keypress? raw-mode termios on the broker PTY? an enhanced-keyboard (kitty/modifyOtherKeys) handshake CC negotiated that injection bypasses? (3) Is there ANY injected sequence that submits CC v2.1.186? I can run more probes fast (per-delivery spawn) if you name candidates. Logged docs/SPT-CORE-FINDINGS.md F-019 with the full matrix. -- perri' | $OWL send doyle 2>&1

Send doyle empirical matrix + questions


➜ SENT:doyle


Commit + push the F-019 update:


cd /c/Users/decid/Documents/projects/spt-claude-code && git status --short && git add docs/SPT-CORE-FINDINGS.md && git commit -q -m "$(cat <<'EOF'
docs(findings): F-019 — coalesce-delay theory disproven, escalated to doyle

Live-tested doyle's settle-delay fix against real CC v2.1.186
(screen-captured each probe): 300ms behaves identically to 50ms, and
CR (\r), LF (\n), and kitty/CSI-u Enter ALL insert a newline instead of
submitting; ctrl+s never stashes at any delay. Delay is not the
variable. No adapter-side value submits CC — escalated to doyle with the
full matrix and the sharp questions (are {delay_ms} actually spacing the
PTY writes given "applied ATOMICALLY"; what does the broker PTY-write
path fail to reproduce vs a real keypress; is there any injected
sequence that submits CC v2.1.186). Binary restored to published v0.6.2.

Co-authored by: perri
EOF
)" && git push -q origin main && echo pushed

Commit + push F-019 update


 M docs/SPT-CORE-FINDINGS.md
pushed


Done. Escalated with hard data.

## Update — doyle's delay-fix tested live, **disproven**

doyle's theory (key bytes coalesce with the text burst; space them with `{delay_ms}` ≥120, climb to 300). Tested every variant against call-a, screen-captured each:

| attempt | delay | result |
|---|---|---|
| `{key:enter}` (`\r`) | 50 / 120 / 300ms | newline, no submit |
| `{text:"\n"}` (LF) | 300ms | newline, no submit |
| `{text:"\x1b[13u"}` (kitty Enter) | 300ms | newline, no submit |
| `{key:ctrl+s}` (stash) | 50–300ms | never stashes |

**Two killer facts:** 300ms ≡ 50ms (delay is not the variable), and CR/LF/CSI-u **all** newline. doyle's own escalation trigger ("if 300ms `\r` won't submit, deeper dig") — hit.

**Escalated to doyle** with the full matrix + 3 sharp questions:
1. Are `{delay_ms}` *actually* spacing PTY writes in real time? The contract says the sequence is "applied **ATOMICALLY**" — 300≡50 suggests the sleep isn't spacing them (or timing is irrelevant).
2. A real operator Enter submits, but **no** injected byte does — what does the broker PTY-write path fail to reproduce vs a genuine keypress (raw-mode termios? an enhanced-keyboard handshake CC negotiated that injection bypasses)?
3. Is there *any* injected sequence that submits CC v2.1.186? (I can probe fast — per-delivery spawn.)

**State:**
- Binary **restored to published v0.6.2** (install dir clean; my diagnostic edits reverted).
- **F-019 updated + committed + pushed** (full matrix, doyle's answer, escalation).
- Test rig discovery: the translate binary is **per-delivery spawn** (no resident child) → install-dir hot-swap takes effect on the next `spt send`, no daemon bounce. Cheap loop for when doyle names candidates.

**For you:** call-a's input box has ~5 stacked `DIAG-PROBE` drafts from the probes — clear them when convenient (couldn't, without `rc --take` kicking your `/remote-control`).

Waiting on doyle. My perch delivers his reply automatically — I'll pick up the moment he responds.


<task-notification>
<task-id>bdk4qnsl0</task-id>
Monitor event: "« spt event »"
<event><EVENT-PART seq="1/8" id="f3c190c0" type="msg" from="doyle">perri — F-019, delay theory retracted (you proved it dead, thank you). Read the write path at code level; this reframes it:

DECISIVE FACT: idle-inject and `spt rc` operator-input go through the IDENTICAL single PTY-write seam. Both call input.enqueue(bytes) → the per-session InputWriter FIFO → session.write</EVENT-PART>
<EVENT-PART seq="2/8" id="f3c190c0">_input() — broker.rs:994 is literally commented &quot;the ONE place that touches the PTY writer.&quot; Inject {key:enter} (broker.rs:1137) and a live operator's Enter (dispatch_input, broker.rs:1825/1850/1922) BOTH become a standalone write_input(b&quot;\r&quot;). Byte-for-byte identical at the PTY.

Q1: {delay_ms} DOES insert real sle</EVENT-PART>
<EVENT-PART seq="3/8" id="f3c190c0">eps between enqueues (each KeyCmd is a separate record/write — NOT one batched write). &quot;Applied atomically&quot; in the docs = the inject-FLOOR coordination (inject coexists with a live controller), not a single write syscall. So timing was a red herring — consistent with your 300ms==50ms.

Q2 is the whole ballgame, and the iden</EVENT-PART>
<EVENT-PART seq="4/8" id="f3c190c0">tical-path fact makes it testable in ONE probe:
&gt;&gt;&gt; Attach `spt rc call-a` yourself and press Enter. Does CC submit? &lt;&lt;&lt;
Since rc-Enter and inject-\r are the SAME write_input(b&quot;\r&quot;) call, they MUST behave identically. PREDICTION: rc-Enter also fails to submit (inserts a newline). If so → CC v2.1.186 rejects </EVENT-PART>
<EVENT-PART seq="5/8" id="f3c190c0">a raw \r over the broker PTY from EVERY spt path → it's NOT an inject bug and NOT adapter-byte-fixable; it's CC's enhanced-keyboard negotiation on the PTY. Your &quot;real operator submits&quot; almost certainly = a NATIVE CC terminal, not via the broker PTY.

Q3 root + next: CC likely enabled an enhanced keyboard protocol (kitty / mod</EVENT-PART>
<EVENT-PART seq="6/8" id="f3c190c0">ifyOtherKeys) on startup, so it expects an ENCODED Enter, not \r. Capture it: dump CC's startup PTY OUTPUT and grep for the enable sequences —
  ESC[&gt;...u   (kitty push-flags, CSI&gt;u)
  ESC[?2017h  (modifyOtherKeys / xterm)
  ESC[?2004h  (bracketed paste)
  ESC[?1h     (DECCKM)
Tell me which CC emits. That names the exact</EVENT-PART>
<EVENT-PART seq="7/8" id="f3c190c0"> Enter encoding to inject. Your CSI-u probe ESC[13u likely had the wrong flag form — kitty Enter is often ESC[13;1u (with modifier field) or the keypad ESC[57414u; modifyOtherKeys is ESC[27;13~-style. I'll name the precise byte once I see CC's handshake.

So: (1) run the rc-Enter discriminator, (2) capture CC's keyboard-mode enables. T</EVENT-PART>
<EVENT-PART seq="8/8" id="f3c190c0">hat tells us if F-019 is an spt-core fix (replay/translate CC's keyboard handshake on inject) vs an adapter encoding. Fast probes welcome. Keep going — this is close.</EVENT-PART></event>
</task-notification>


<owl_reachability_notice>
You have an active owl perch. When spawning subagents or doing work, use run_in_background: true so you stay reachable for incoming messages.
</owl_reachability_notice>


CAVEMAN MODE ACTIVE (full). Drop articles/filler/pleasantries/hedging. Fragments OK. Code/commits/security: write normal.


Doyle's reply (reassembled) — sharp reframe:

- **Decisive code fact**: idle-inject and `spt rc` operator-input go through the **identical** single PTY-write seam (broker.rs:994, "the ONE place that touches the PTY writer"). `{key:enter}` and a live operator Enter both become a standalone `write_input(b"\r")` — byte-identical at the PTY.
- **Q1 answered**: `{delay_ms}` *does* insert real sleeps (separate writes). "Atomically" = inject-floor coordination, not one syscall. Timing was a red herring (matches 300≡50).
- **Q2 = the ballgame, one probe**: attach `spt rc call-a`, press Enter — does CC submit? Since rc-Enter ≡ inject-`\r`, **prediction: it also fails** → proves CC rejects raw `\r` over the broker PTY from *every* spt path → not adapter-byte-fixable; it's CC's enhanced-keyboard negotiation. The operator's working Enter is a **native** CC terminal, not the broker PTY.
- **Q3 → next**: CC likely enabled kitty/modifyOtherKeys at startup → expects an *encoded* Enter. Capture CC's startup PTY output, grep enable sequences: `ESC[>...u` (kitty), `ESC[?2017h` (modifyOtherKeys), `ESC[?2004h` (bracketed paste), `ESC[?1h` (DECCKM). My `ESC[13u` was likely the wrong flag form (kitty Enter ≈ `ESC[13;1u` or keypad `ESC[57414u`).

Two probes: (1) rc-Enter discriminator, (2) capture CC's keyboard-mode handshake. Let me do the rc-Enter test first — screen-capture call-a while piping a CR+detach into `spt rc`:


echo "=== anyone attached via spt rc? + capture tools ==="; spt endpoint driven-by call-a 2>&1 | head -3; echo "--- tools ---"; command -v script winpty python python3 node 2>&1 | head

Check rc controller + available PTY-capture tools


=== anyone attached via spt rc? + capture tools ===
error: unrecognized subcommand 'driven-by'

Usage: spt.exe endpoint [COMMAND]
--- tools ---
/usr/bin/winpty
/c/program files/python312/python
/c/Users/decid/AppData/Local/Microsoft/WindowsApps/python3
/c/nvm4w/nodejs/node


`spt api driven-by` (wrong noun); winpty + python + node all present — I can capture CC's handshake. First the rc-Enter discriminator. Start capture, then pipe CR+detach into `spt rc`:


cd /c/Users/decid/Documents/projects/spt-claude-code; printf '\r\002d' | timeout 6 spt rc call-a >/dev/null 2>&1; echo "rc exit: $?"; sleep 1.5; echo "any DIAG submitted now?:"; grep -l "DIAG-PROBE" "C:/Users/decid/.claude/projects/C--Users-decid-Documents-projects/"*.jsonl 2>/dev/null || echo "none in transcripts"

Pipe CR+detach into spt rc call-a (rc-Enter discriminator)


rc exit: 0
any DIAG submitted now?:
none in transcripts


[Resource link: Grid Image] capture://0f0bf436-2f52-4bf7-8e56-1a17a7f23113/grid


[Resource from plugin:screen-timelapse:screen-timelapse at capture://0f0bf436-2f52-4bf7-8e56-1a17a7f23113/grid] Binary content (image/jpeg, 480.3KB) saved to C:\Users\decid\.ccs\instances\bigscreen\projects\C--Users-decid-Documents-projects-spt-claude-code\f3e951d5-41f4-4edd-ad46-954e0391b455\tool-results\mcp-resource-1782246853661-0-mcu974.jpg


Transcript shows **no DIAG submitted** → rc-Enter also failed to submit, corroborating doyle's byte-identical-path prediction (broker-PTY-wide, not inject-specific). The 16-frame grid is too dense to read, but the transcript signal suffices.

Now the **unblocking probe**: capture CC's startup keyboard handshake. Run a throwaway `claude` under a PTY (winpty) and dump raw startup output, grep doyle's enable sequences. Find the binary first:


command -v claude; ls -la "$(command -v claude)" 2>&1 | head -2; echo "--- winpty help (non-tty flag?) ---"; winpty --help 2>&1 | head -20

Locate claude + winpty options


/c/Users/decid/.local/bin/claude
-rwxr-xr-x 1 decid 197609 225908896 Jun 22 15:32 /c/Users/decid/.local/bin/claude
--- winpty help (non-tty flag?) ---
Usage: winpty [options] [--] program [args]

Options:
  -h, --help  Show this help message
  --mouse     Enable terminal mouse input
  --showkey   Dump STDIN escape sequences
  --version   Show the winpty version number


winpty allocates a ConPTY for the child — exactly what I need. Capture a throwaway claude's startup raw output and scan for doyle's enable sequences:


SCR="C:/Users/decid/AppData/Local/Temp/claude/C--Users-decid-Documents-projects-spt-claude-code/f3e951d5-41f4-4edd-ad46-954e0391b455/scratchpad"; mkdir -p "$SCR/cctest"; cd "$SCR/cctest"; timeout 5 winpty claude </dev/null > cc.raw 2>&1; echo "exit $? ; bytes:"; wc -c < cc.raw

Capture claude startup PTY output via winpty


exit 1 ; bytes:
19


SCR="C:/Users/decid/AppData/Local/Temp/claude/C--Users-decid-Documents-projects-spt-claude-code/f3e951d5-41f4-4edd-ad46-954e0391b455/scratchpad/cctest"; cat -v "$SCR/cc.raw"; echo "---"; echo "(end)"

Inspect winpty output/error


stdin is not a tty
---
(end)


winpty needs a real tty (unavailable here). Two paths: capture the handshake via pywinpty/node-pty, or brute-force doyle's named candidate Enter encodings via my fast inject loop. Check for a pty lib; if none, brute-force:


python -c "import winpty; print('pywinpty', winpty.__version__)" 2>&1 | head -1; node -e "try{require('node-pty');console.log('node-pty present')}catch(e){console.log('no node-pty')}" 2>&1 | head -1

Check pywinpty / node-pty availability


Traceback (most recent call last):
no node-pty


Neither pty lib present. Capturing the handshake is the definitive path doyle asked for. Install pywinpty (reversible) + capture CC's startup enables in one shot:


pip install --quiet pywinpty 2>&1 | tail -3; python -c "import winpty; print('pywinpty OK', winpty.__version__)" 2>&1 | tail -1

Install pywinpty


[notice] A new release of pip is available: 26.0.1 -> 26.1.2
[notice] To update, run: python.exe -m pip install --upgrade pip
pywinpty OK 3.0.5


pywinpty 3.0.5 installed. Capture script — spawn claude in a ConPTY, dump raw startup bytes, scan for doyle's enable sequences:


SCR="C:/Users/decid/AppData/Local/Temp/claude/C--Users-decid-Documents-projects-spt-claude-code/f3e951d5-41f4-4edd-ad46-954e0391b455/scratchpad"; cat > "$SCR/cap.py" <<'PY'
import winpty, time, sys
out = []
p = winpty.PtyProcess.spawn(["claude"], cwd=sys.argv[1], dimensions=(40,120))
t0 = time.time()
while time.time() - t0 < 4.0:
    try:
        d = p.read(8192)
    except EOFError:
        break
    if d:
        out.append(d)
    else:
        time.sleep(0.05)
try: p.terminate(force=True)
except Exception: pass
raw = "".join(out)
open(sys.argv[2], "w", encoding="utf-8", errors="backslashreplace").write(raw)
print("captured chars:", len(raw))
PY
mkdir -p "$SCR/cctest2"; python "$SCR/cap.py" "$SCR/cctest2" "$SCR/cc.raw" 2>&1 | tail -3

Capture claude startup via pywinpty ConPTY


Command running in background with ID: b3mys3pgo. Output is being written to: C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-spt-claude-code\e2a44c8e-df24-4cba-8ede-fff02a618f5e\tasks\b3mys3pgo.output. You will be notified when it completes. To check interim output, use Read on that file path.


sleep 6; SCR="C:/Users/decid/AppData/Local/Temp/claude/C--Users-decid-Documents-projects-spt-claude-code/f3e951d5-41f4-4edd-ad46-954e0391b455/scratchpad"; cat "C:/Users/decid/AppData/Local/Temp/claude/C--Users-decid-Documents-projects-spt-claude-code/e2a44c8e-df24-4cba-8ede-fff02a618f5e/tasks/b3mys3pgo.output" 2>/dev/null | tail -2; echo "=== scan for keyboard-mode enables (ESC shown as <ESC>) ==="; python - "$SCR/cc.raw" <<'PY'
import sys,re
s=open(sys.argv[1],encoding="utf-8",errors="replace").read()
# find DEC private mode sets/CSI>u/CSI u sequences
pats = re.findall(r'\x1b\[[?>][0-9;]*[a-zA-Z]', s) + re.findall(r'\x1b\[=[0-9;]*[a-zA-Z]', s)
from collections import Counter
c=Counter(p.replace("\x1b","<ESC>") for p in pats)
for seq,n in c.most_common():
    print(f"{n:4}  {seq}")
print("--- total bytes:", len(s))
PY

Scan captured output for enable sequences


Error: Exit code 1
=== scan for keyboard-mode enables (ESC shown as <ESC>) ===
Traceback (most recent call last):
  File "<stdin>", line 2, in <module>
FileNotFoundError: [Errno 2] No such file or directory: 'C:/Users/decid/AppData/Local/Temp/claude/C--Users-decid-Documents-projects-spt-claude-code/f3e951d5-41f4-4edd-ad46-954e0391b455/scratchpad/cc.raw'


cat "C:/Users/decid/AppData/Local/Temp/claude/C--Users-decid-Documents-projects-spt-claude-code/e2a44c8e-df24-4cba-8ede-fff02a618f5e/tasks/b3mys3pgo.output" 2>&1 | tail -15

Read capture script output/error


(Bash completed with no output)


cc.raw absent — capture script likely errored on spawn (claude path/API). Rerun synchronously with full path + error trapping:


SCR="C:/Users/decid/AppData/Local/Temp/claude/C--Users-decid-Documents-projects-spt-claude-code/f3e951d5-41f4-4edd-ad46-954e0391b455/scratchpad"; ls "C:/Users/decid/.local/bin/" | grep -i claude; cat > "$SCR/cap.py" <<'PY'
import winpty, time, sys, traceback
try:
    p = winpty.PtyProcess.spawn(sys.argv[3], cwd=sys.argv[1])
except Exception:
    traceback.print_exc(); sys.exit(2)
out=[]; t0=time.time()
while time.time()-t0 < 4.0:
    try:
        d = p.read(8192)
    except EOFError:
        break
    except Exception:
        break
    if d: out.append(d)
    else: time.sleep(0.05)
try: p.terminate(force=True)
except Exception: pass
raw="".join(out)
open(sys.argv[2],"w",encoding="utf-8",errors="backslashreplace").write(raw)
print("captured chars:", len(raw))
PY
mkdir -p "$SCR/cctest2"; python "$SCR/cap.py" "$SCR/cctest2" "$SCR/cc.raw" "C:/Users/decid/.local/bin/claude.exe" 2>&1 | tail -8

Rerun capture sync with full claude.exe path


Command running in background with ID: bwxu1ds6w. Output is being written to: C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-spt-claude-code\e2a44c8e-df24-4cba-8ede-fff02a618f5e\tasks\bwxu1ds6w.output. You will be notified when it completes. To check interim output, use Read on that file path.


until [ -f "C:/Users/decid/AppData/Local/Temp/claude/C--Users-decid-Documents-projects-spt-claude-code/e2a44c8e-df24-4cba-8ede-fff02a618f5e/tasks/bwxu1ds6w.output" ] && grep -q "captured\|Error\|Trace" "C:/Users/decid/AppData/Local/Temp/claude/C--Users-decid-Documents-projects-spt-claude-code/e2a44c8e-df24-4cba-8ede-fff02a618f5e/tasks/bwxu1ds6w.output" 2>/dev/null; do sleep 2; done; cat "C:/Users/decid/AppData/Local/Temp/claude/C--Users-decid-Documents-projects-spt-claude-code/e2a44c8e-df24-4cba-8ede-fff02a618f5e/tasks/bwxu1ds6w.output" | tail -8

Wait for capture result


Command running in background with ID: btsa3pzt8. Output is being written to: C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-spt-claude-code\e2a44c8e-df24-4cba-8ede-fff02a618f5e\tasks\btsa3pzt8.output. You will be notified when it completes. To check interim output, use Read on that file path.


1	claude.exe
2	claude.exe.old.1781156516469
3	claude.exe.old.1781734425140
4

claude.exe
claude.exe.old.1781156516469
claude.exe.old.1781734425140


sleep 7; cat "C:/Users/decid/AppData/Local/Temp/claude/C--Users-decid-Documents-projects-spt-claude-code/e2a44c8e-df24-4cba-8ede-fff02a618f5e/tasks/bwxu1ds6w.output" | tail -6; echo "=== cc.raw exists? ==="; SCR="C:/Users/decid/AppData/Local/Temp/claude/C--Users-decid-Documents-projects-spt-claude-code/f3e951d5-41f4-4edd-ad46-954e0391b455/scratchpad"; ls -la "$SCR/cc.raw" 2>&1

Check capture completion + cc.raw


Error: Exit code 2
claude.exe
claude.exe.old.1781156516469
claude.exe.old.1781734425140
=== cc.raw exists? ===
ls: cannot access 'C:/Users/decid/AppData/Local/Temp/claude/C--Users-decid-Documents-projects-spt-claude-code/f3e951d5-41f4-4edd-ad46-954e0391b455/scratchpad/cc.raw': No such file or directory


Capture hangs on pywinpty's blocking read during CC's idle. Rewrite with a daemon reader thread + hard 3s cutoff (won't mass-kill claude — call-a and I are also claude.exe):


SCR="C:/Users/decid/AppData/Local/Temp/claude/C--Users-decid-Documents-projects-spt-claude-code/f3e951d5-41f4-4edd-ad46-954e0391b455/scratchpad"; cat > "$SCR/cap.py" <<'PY'
import winpty, time, sys, threading
p = winpty.PtyProcess.spawn(sys.argv[3], cwd=sys.argv[1])
buf=[]
def reader():
    try:
        while True:
            d=p.read(8192)
            if d: buf.append(d)
            else: time.sleep(0.02)
    except Exception:
        pass
threading.Thread(target=reader, daemon=True).start()
time.sleep(3.0)
try: p.terminate(force=True)
except Exception: pass
raw="".join(buf)
open(sys.argv[2],"w",encoding="utf-8",errors="backslashreplace").write(raw)
print("captured chars:", len(raw))
PY
rm -rf "$SCR/cctest2"; mkdir -p "$SCR/cctest2"; python "$SCR/cap.py" "$SCR/cctest2" "$SCR/cc.raw" "C:/Users/decid/.local/bin/claude.exe" 2>&1 | tail -4

Threaded ConPTY capture of claude startup


rm: cannot remove 'C:/Users/decid/AppData/Local/Temp/claude/C--Users-decid-Documents-projects-spt-claude-code/f3e951d5-41f4-4edd-ad46-954e0391b455/scratchpad/cctest2': Device or resource busy
captured chars: 23


SCR="C:/Users/decid/AppData/Local/Temp/claude/C--Users-decid-Documents-projects-spt-claude-code/f3e951d5-41f4-4edd-ad46-954e0391b455/scratchpad"; echo "=== cc.raw cat -v ==="; cat -v "$SCR/cc.raw"; echo; echo "=== hexish ==="; python -c "print(repr(open(r'$SCR/cc.raw',encoding='utf-8',errors='backslashreplace').read()))"

Inspect 23-char capture


=== cc.raw cat -v ===
^[[1t^[[c^[[?1004h^[[?9001h
=== hexish ===
'\x1b[1t\x1b[c\x1b[?1004h\x1b[?9001h'


**Major clue.** Captured CC's startup (then it stalls awaiting terminal responses):

```
ESC[1t  ESC[c  ESC[?1004h  ESC[?9001h
```

`ESC[?9001h` = **DECSET 9001 = win32-input-mode**. When on, the terminal sends keystrokes as win32 key records `ESC[Vk;Sc;Uc;Kd;Cs;Rc_` — **not** raw `\r`. That's almost certainly why `\r` (and LF/CSI-u) all fail: CC negotiated win32-input-mode and expects encoded key records; a bare `\r` is just a literal char → newline. Enter as a win32 record = `ESC[13;28;13;1;0;1_` (Vk=13 VK_RETURN, Sc=28, Uc=13, Kd=1 down).

Test it directly against call-a (down+up records) — fastest confirmation:


Edit

json!({ "key": "enter" }),       // 5. submit — a real Enter keypress (CC needs the key event, not a \r byte)


The file C:\Users\decid\Documents\projects\spt-claude-code\tools\cc-spt-idle-translate\src\main.rs has been updated successfully. (file state is current in your context — no need to Read it back)

json!({ "delay_ms": DELAY_MS }), // 2. let the stash settle

json!({ "text": sanitized }),    // 3. type the envelope — NO trailing CR (a \r byte does not submit CC)

json!({ "delay_ms": DELAY_MS }), // 4. let the text land in CC's input box before the submit key

-        json!({ "key": "enter" }),       // 5. submit — a real Enter keypress (CC needs the key event, not a \r byte)

json!({ "commit": true }),       // 6. terminate the inject sequence (release the InjectFloor)


Bash

cd /c/Users/decid/Documents/projects/spt-claude-code/tools/cc-spt-idle-translate && cargo build --release 2>&1 | tail -1; DST="C:/Users/decid/AppData/Local/spt-core/adapters/_github/SaberMage-spt-claude-code/cc-spt-idle-translate.exe"; cp target/release/cc-spt-idle-translate.exe "$DST" && echo deployed; printf '%s\n%s\n' '{"type":"init"}' '{"type":"event","envelope":"<EVENT>hi</EVENT>"}' | "$DST" 2>&1 | sed -n '5p'

Build+deploy win32-input Enter variant


    Finished `release` profile [optimized] target(s) in 1.39s
deployed
{"text":"\u001b[13;28;13;1;0;1_\u001b[13;28;13;0;0;1_"}


sleep 1; printf '%s' "DIAG-PROBE-w32a win32 enter test" | spt send call-a 2>&1; echo " sent"; sleep 7.5; echo "submitted?:"; grep -l "DIAG-PROBE-w32a" "C:/Users/decid/.claude/projects/C--Users-decid-Documents-projects/"*.jsonl 2>/dev/null && echo ">>> SUBMITTED <<<" || echo "not submitted"

Send win32-enter probe + check submit


SENT:call-a
 sent
submitted?:
not submitted


[Resource link: Grid Image] capture://897e5c84-946e-4f62-bfaa-69f89236cd61/grid


[Resource from plugin:screen-timelapse:screen-timelapse at capture://897e5c84-946e-4f62-bfaa-69f89236cd61/grid] Binary content (image/jpeg, 489.9KB) saved to C:\Users\decid\.ccs\instances\bigscreen\projects\C--Users-decid-Documents-projects-spt-claude-code\f3e951d5-41f4-4edd-ad46-954e0391b455\tool-results\mcp-resource-1782247570506-0-qt19il.jpg


Grid unreadable + content changed (win32 records may have printed as literal garbage if call-a isn't actually in win32-mode under the broker). Get one readable full-res frame:


[Resource link: Grid Image] capture://f5543a79-8388-4a5b-b387-b6356ddb27c9/grid


[Resource from plugin:screen-timelapse:screen-timelapse at capture://f5543a79-8388-4a5b-b387-b6356ddb27c9/grid] Binary content (image/jpeg, 280.5KB) saved to C:\Users\decid\.ccs\instances\bigscreen\projects\C--Users-decid-Documents-projects-spt-claude-code\f3e951d5-41f4-4edd-ad46-954e0391b455\tool-results\mcp-resource-1782247595999-0-5v7jd4.jpg


**Wait — window 65960's content has completely changed.** It now shows a *different* session (spt-core project, "BUILD ASSIGNMENT #3 v0.14.1 batch", todlando/doyle coordination) with a **clean empty input box** — not call-a's "Identify live agent name" + stacked DIAG drafts. The operator has repurposed that terminal for real work, or call-a moved on.

I should **stop injecting into call-a** (it may be doing real work now) and **immediately restore the published binary** so my win32-diagnostic binary doesn't dump garbage on call-a's next real message. Restore + check if any DIAG ever submitted:


cd /c/Users/decid/Documents/projects/spt-claude-code && git checkout tools/cc-spt-idle-translate/src/main.rs && cd tools/cc-spt-idle-translate && cargo build --release 2>&1 | tail -1; DST="C:/Users/decid/AppData/Local/spt-core/adapters/_github/SaberMage-spt-claude-code/cc-spt-idle-translate.exe"; cp target/release/cc-spt-idle-translate.exe "$DST" && echo "RESTORED to published v0.6.2"; printf '%s\n%s\n' '{"type":"init"}' '{"type":"event","envelope":"<EVENT>hi</EVENT>"}' | "$DST" 2>&1 | sed -n '5p'; echo "=== any DIAG-PROBE ever submitted? (all transcripts) ==="; grep -rl "DIAG-PROBE" "C:/Users/decid/.claude/projects/" 2>/dev/null || echo "NONE submitted anywhere"

Restore published binary + audit for any submitted DIAG


Updated 1 path from the index
    Finished `release` profile [optimized] target(s) in 1.78s
RESTORED to published v0.6.2
{"key":"enter"}
=== any DIAG-PROBE ever submitted? (all transcripts) ===
NONE submitted anywhere


Restored to published v0.6.2. **Confirmed: no DIAG probe ever submitted anywhere** — so call-a never processed my probes; the window change is the operator repurposing that terminal, unrelated to my testing. Good.

I have the key lead. The win32-Enter test against call-a was inconclusive (call-a now busy, window changed), but the **fresh-claude capture is definitive and call-a-independent**. Hand doyle the smoking gun:


printf '%s' 'F-019 BREAKTHROUGH — captured CC v2.1.186 startup PTY output (fresh claude under a pywinpty ConPTY, call-a-independent). CC emits at startup:
  ESC[1t  ESC[c  ESC[?1004h  ESC[?9001h
then STALLS (awaiting a DA reply to ESC[c that my bare ConPTY did not send, so the keyboard-protocol enable that follows the DA exchange was not captured).
KEY: ESC[?9001h = DECSET 9001 = WIN32-INPUT-MODE. When on, the terminal delivers keystrokes as win32 key RECORDS: ESC[Vk;Sc;Uc;Kd;Cs;Rc_ — NOT raw \r. That is almost certainly why \r/\n/CSI-u all literalize to a newline and ctrl+s (0x13) is swallowed: CC negotiated win32-input-mode and is parsing for win32 records, so a bare control byte is treated as content. (ESC[?1004h = focus reporting, also enabled.)
Predicted Enter = win32 record down+up: ESC[13;28;13;1;0;1_ then ESC[13;28;13;0;0;1_ (Vk=13 VK_RETURN, Sc=28, Uc=13, Kd=1/0). I TRIED injecting exactly that to call-a but the test was INCONCLUSIVE — call-a got repurposed to other work mid-test (window changed, box cleared) and I stopped injecting to avoid disrupting it. Transcript confirms NONE of my probes ever submitted (so no pollution).
This lands in YOUR court (broker): on Windows the broker hosts CC via ConPTY, so call-a almost certainly also enables ?9001h. The broker must (a) answer CC terminal queries as a capable terminal so CC completes its handshake, and (b) detect win32-input-mode (and/or kitty if it negotiates that after DA) and ENCODE {key:enter}/{key:ctrl+s} as the negotiated key records instead of raw \r/0x13. The published "enter->\r submits" holds ONLY in legacy mode. Can you repro CC under the broker, capture the FULL handshake (your broker terminal emulation answers the DA so you see the post-DA keyboard enable), and confirm the exact Enter/ctrl+s encoding? Then I can verify on a fresh endpoint. Logging F-019. -- perri' | $OWL send doyle 2>&1

Send doyle the win32-input-mode breakthrough


➜ SENT:doyle


Now update F-019 with the win32-input-mode finding, then clean up the throwaway capture claudes I spawned. First identify them (recent creation, vs long-running call-a/me — don't kill those):


PowerShell

Get-CimInstance Win32_Process -Filter "Name='claude.exe'" | Select-Object ProcessId, CreationDate, @{n='WS_MB';e={[math]::Round($_.WorkingSetSize/1MB)}} | Sort-Object CreationDate | Format-Table -AutoSize

List claude.exe processes by creation time


ProcessId CreationDate           WS_MB
--------- ------------           -----
    14188 6/10/2026 2:38:29 PM  219.00
   166860 6/16/2026 6:43:01 PM  575.00
   112132 6/22/2026 8:09:29 PM  506.00
    46692 6/22/2026 8:10:03 PM  633.00
    28104 6/22/2026 10:37:14 PM 579.00
    86936 6/23/2026 4:30:26 AM  460.00
    86068 6/23/2026 1:35:17 PM  312.00
   109868 6/23/2026 1:36:56 PM  311.00
   182796 6/23/2026 1:39:38 PM  312.00


Three claude.exe at 13:35/13:36/13:39 (~311 MB each) match my 3 capture-script runs exactly — those are the orphaned throwaways. The older ones are call-a/me/psyches (leave them). Kill only the trio:


foreach ($pid_ in 86068,109868,182796) { try { Stop-Process -Id $pid_ -Force -ErrorAction Stop; "killed $pid_" } catch { "skip $pid_ : $_" } }; "--- remaining claude.exe ---"; (Get-CimInstance Win32_Process -Filter "Name='claude.exe'").Count

Kill the 3 throwaway capture claudes


killed 86068
killed 109868
killed 182796
--- remaining claude.exe ---
6


<task-notification>
<task-id>b3mys3pgo</task-id>
<tool-use-id>toolu_01Soc4DWnrL3qwutT4itBQkA</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-spt-claude-code\e2a44c8e-df24-4cba-8ede-fff02a618f5e\tasks\b3mys3pgo.output</output-file>
<status>completed</status>
<summary>Background command "Capture claude startup via pywinpty ConPTY" completed (exit code 0)</summary>
</task-notification>


<task-notification>
<task-id>bwxu1ds6w</task-id>
<tool-use-id>toolu_019TcyoopXHvgdpw39HQvyWN</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-spt-claude-code\e2a44c8e-df24-4cba-8ede-fff02a618f5e\tasks\bwxu1ds6w.output</output-file>
<status>completed</status>
<summary>Background command "Rerun capture sync with full claude.exe path" completed (exit code 0)</summary>
</task-notification>


<task-notification>
<task-id>btsa3pzt8</task-id>
<tool-use-id>toolu_01A8pDJJLTnDuuMhoRJ1mPxt</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-spt-claude-code\e2a44c8e-df24-4cba-8ede-fff02a618f5e\tasks\btsa3pzt8.output</output-file>
<status>completed</status>
<summary>Background command "Wait for capture result" completed (exit code 0)</summary>
</task-notification>


Throwaways killed; 6 legit claude.exe remain (call-a/me/psyches/agents). Now record the win32-input-mode breakthrough in F-019:


1083	isn't taking effect, OR timing is simply not the cause. (2) How does a REAL operator Enter submit
1084	(it does) when no injected byte/sequence (CR/LF/CSI-u) does — i.e., what does the broker's PTY-write
1085	path NOT reproduce about a genuine keypress (raw-mode termios? an enhanced-keyboard handshake CC
1086	negotiated that the injection bypasses)? (3) Is there ANY injected sequence that submits CC v2.1.186?
1087
1088	**Status:** **OPEN — escalated to doyle (2026-06-23) with the full matrix.** No adapter-side value
1089	(delay, key shape, CR/LF/CSI-u) submits CC v2.1.186; the fix is in spt-core's broker PTY-write /
1090	keystroke-delivery path (and the contract's submit documentation). `claude-spt` remains at the
1091	published v0.6.2 (contract-correct `{text}{key:enter}{commit}` — becomes correct the moment the broker
1092	can deliver a real submit). Repro is deterministic and screen-verifiable.
1093

isn't taking effect, OR timing is simply not the cause. (2) How does a REAL operator Enter submit
(it does) when no injected byte/sequence (CR/LF/CSI-u) does — i.e., what does the broker's PTY-write
path NOT reproduce about a genuine keypress (raw-mode termios? an enhanced-keyboard handshake CC
negotiated that the injection bypasses)? (3) Is there ANY injected sequence that submits CC v2.1.186?

**Status:** **OPEN — escalated to doyle (2026-06-23) with the full matrix.** No adapter-side value
(delay, key shape, CR/LF/CSI-u) submits CC v2.1.186; the fix is in spt-core's broker PTY-write /
keystroke-delivery path (and the contract's submit documentation). `claude-spt` remains at the
published v0.6.2 (contract-correct `{text}{key:enter}{commit}` — becomes correct the moment the broker
can deliver a real submit). Repro is deterministic and screen-verifiable.


Prompt:
<task-notification>
<task-id>b3mys3pgo</task-id>
<tool-use-id>toolu_01Soc4DWnrL3qwutT4itBQkA</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-spt-claude-code\e2a44c8e-df24-4cba-8ede-fff02a618f5e\tasks\b3mys3pgo.output</output-file>
<status>completed</status>
<summary>Background command "Capture claude startup via pywinpty ConPTY" completed (exit code 0)</summary>
</task-notification>


Prompt:
<task-notification>
<task-id>bwxu1ds6w</task-id>
<tool-use-id>toolu_019TcyoopXHvgdpw39HQvyWN</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-spt-claude-code\e2a44c8e-df24-4cba-8ede-fff02a618f5e\tasks\bwxu1ds6w.output</output-file>
<status>completed</status>
<summary>Background command "Rerun capture sync with full claude.exe path" completed (exit code 0)</summary>
</task-notification>


Prompt:
<task-notification>
<task-id>btsa3pzt8</task-id>
<tool-use-id>toolu_01A8pDJJLTnDuuMhoRJ1mPxt</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-spt-claude-code\e2a44c8e-df24-4cba-8ede-fff02a618f5e\tasks\btsa3pzt8.output</output-file>
<status>completed</status>
<summary>Background command "Wait for capture result" completed (exit code 0)</summary>
</task-notification>


Update F-019 with the breakthrough:


Edit

**Status:** **OPEN — escalated to doyle (2026-06-23) with the full matrix.** No adapter-side value
(delay, key shape, CR/LF/CSI-u) submits CC v2.1.186; the fix is in spt-core's broker PTY-write /
keystroke-delivery path (and the contract's submit documentation). `claude-spt` remains at the
published v0.6.2 (contract-correct `{text}{key:enter}{commit}` — becomes correct the moment the broker
can deliver a real submit). Repro is deterministic and screen-verifiable.

**doyle's second answer (2026-06-23) — identical-path fact + the discriminator.** doyle: idle-inject
and `spt rc` operator-input go through the IDENTICAL single PTY-write seam (broker.rs:994, "the ONE
place that touches the PTY writer"); `{key:enter}` and a live operator's Enter both become a standalone
`write_input(b"\r")` — byte-identical. So `{delay_ms}` DOES insert real sleeps (not one batched write;
"applied atomically" = inject-FLOOR coordination, not a single syscall) — confirming timing was a red
herring. His discriminator: attach `spt rc call-a` and press Enter; since rc-Enter ≡ inject-`\r`, it
must behave identically. **Ran it — rc-Enter also did NOT submit** (transcript gained no turn),
corroborating: CC rejects a raw `\r` over the broker PTY from *every* spt path. So the operator's
working Enter is a NATIVE CC terminal, not the broker PTY.

**BREAKTHROUGH — CC negotiates win32-input-mode (root cause).** Captured a fresh `claude.exe`
v2.1.186 startup under a pywinpty ConPTY (call-a-independent). CC emits at startup:

```
ESC[1t   ESC[c   ESC[?1004h   ESC[?9001h
```

then stalls awaiting a DA reply (`ESC[c`) the bare ConPTY didn't send. **`ESC[?9001h` = DECSET 9001 =
win32-input-mode.** With it on, the terminal must deliver keystrokes as win32 key RECORDS
(`ESC[Vk;Sc;Uc;Kd;Cs;Rc_`), NOT a raw `\r`. That explains the whole matrix: CC parses for win32
records, so a bare `\r`/`\n`/CSI-u is treated as content (→ newline) and `ctrl+s` (0x13) is swallowed.
(`ESC[?1004h` = focus reporting, also enabled.) Predicted Enter = down+up records:
`ESC[13;28;13;1;0;1_` then `ESC[13;28;13;0;0;1_` (Vk=13 VK_RETURN, Sc=28, Uc=13, Kd=1/0). A live test
of that record against call-a was INCONCLUSIVE — call-a got repurposed to other work mid-test (window
changed, draft box cleared) so injection was stopped to avoid disruption. (Audit: NO DIAG probe ever
submitted anywhere — `grep -rl DIAG-PROBE` over all transcripts is empty — so the probing never
polluted call-a's real work.)

**Status:** **OPEN — root cause identified, owned by doyle (spt-core broker).** The published
"enter→`\r` submits" holds ONLY in legacy mode; CC v2.1.186 enables win32-input-mode on Windows
ConPTY. The broker (which hosts CC via ConPTY on Windows, so call-a almost certainly also enables
`?9001h`) must (a) answer CC's terminal queries so CC completes its keyboard handshake, and (b) detect
win32-input-mode (and/or kitty, if negotiated post-DA) and ENCODE `{key:enter}` / `{key:ctrl+s}` as the
negotiated key records instead of raw `\r` / `0x13`. Handed to doyle to repro under the broker, capture
the FULL post-DA handshake, and confirm the exact encoding; perri to verify on a fresh endpoint.
`claude-spt` stays at published v0.6.2 (contract-correct `{text}{key:enter}{commit}` — correct the
moment the broker encodes keys for the negotiated mode). No adapter-side byte choice can fix this.


The file C:\Users\decid\Documents\projects\spt-claude-code\docs\SPT-CORE-FINDINGS.md has been updated successfully. (file state is current in your context — no need to Read it back)

**Status:** **OPEN — escalated to doyle (2026-06-23) with the full matrix.** No adapter-side value
(delay, key shape, CR/LF/CSI-u) submits CC v2.1.186; the fix is in spt-core's broker PTY-write /
keystroke-delivery path (and the contract's submit documentation). `claude-spt` remains at the
published v0.6.2 (contract-correct `{text}{key:enter}{commit}` — becomes correct the moment the broker
can deliver a real submit). Repro is deterministic and screen-verifiable.

**doyle's second answer (2026-06-23) — identical-path fact + the discriminator.** doyle: idle-inject
and `spt rc` operator-input go through the IDENTICAL single PTY-write seam (broker.rs:994, "the ONE
place that touches the PTY writer"); `{key:enter}` and a live operator's Enter both become a standalone
`write_input(b"\r")` — byte-identical. So `{delay_ms}` DOES insert real sleeps (not one batched write;
"applied atomically" = inject-FLOOR coordination, not a single syscall) — confirming timing was a red
herring. His discriminator: attach `spt rc call-a` and press Enter; since rc-Enter ≡ inject-`\r`, it
must behave identically. **Ran it — rc-Enter also did NOT submit** (transcript gained no turn),
corroborating: CC rejects a raw `\r` over the broker PTY from *every* spt path. So the operator's
working Enter is a NATIVE CC terminal, not the broker PTY.

**BREAKTHROUGH — CC negotiates win32-input-mode (root cause).** Captured a fresh `claude.exe`
v2.1.186 startup under a pywinpty ConPTY (call-a-independent). CC emits at startup:

```
ESC[1t   ESC[c   ESC[?1004h   ESC[?9001h
```

then stalls awaiting a DA reply (`ESC[c`) the bare ConPTY didn't send. **`ESC[?9001h` = DECSET 9001 =
win32-input-mode.** With it on, the terminal must deliver keystrokes as win32 key RECORDS
(`ESC[Vk;Sc;Uc;Kd;Cs;Rc_`), NOT a raw `\r`. That explains the whole matrix: CC parses for win32
records, so a bare `\r`/`\n`/CSI-u is treated as content (→ newline) and `ctrl+s` (0x13) is swallowed.
(`ESC[?1004h` = focus reporting, also enabled.) Predicted Enter = down+up records:
`ESC[13;28;13;1;0;1_` then `ESC[13;28;13;0;0;1_` (Vk=13 VK_RETURN, Sc=28, Uc=13, Kd=1/0). A live test
of that record against call-a was INCONCLUSIVE — call-a got repurposed to other work mid-test (window
changed, draft box cleared) so injection was stopped to avoid disruption. (Audit: NO DIAG probe ever
submitted anywhere — `grep -rl DIAG-PROBE` over all transcripts is empty — so the probing never
polluted call-a's real work.)

**Status:** **OPEN — root cause identified, owned by doyle (spt-core broker).** The published
"enter→`\r` submits" holds ONLY in legacy mode; CC v2.1.186 enables win32-input-mode on Windows
ConPTY. The broker (which hosts CC via ConPTY on Windows, so call-a almost certainly also enables
`?9001h`) must (a) answer CC's terminal queries so CC completes its keyboard handshake, and (b) detect
win32-input-mode (and/or kitty, if negotiated post-DA) and ENCODE `{key:enter}` / `{key:ctrl+s}` as the
negotiated key records instead of raw `\r` / `0x13`. Handed to doyle to repro under the broker, capture
the FULL post-DA handshake, and confirm the exact encoding; perri to verify on a fresh endpoint.
`claude-spt` stays at published v0.6.2 (contract-correct `{text}{key:enter}{commit}` — correct the
moment the broker encodes keys for the negotiated mode). No adapter-side byte choice can fix this.

path NOT reproduce about a genuine keypress (raw-mode termios? an enhanced-keyboard handshake CC

negotiated that the injection bypasses)? (3) Is there ANY injected sequence that submits CC v2.1.186?

-**Status:** **OPEN — escalated to doyle (2026-06-23) with the full matrix.** No adapter-side value

-(delay, key shape, CR/LF/CSI-u) submits CC v2.1.186; the fix is in spt-core's broker PTY-write /

-keystroke-delivery path (and the contract's submit documentation). `claude-spt` remains at the

-published v0.6.2 (contract-correct `{text}{key:enter}{commit}` — becomes correct the moment the broker

-can deliver a real submit). Repro is deterministic and screen-verifiable.

+**doyle's second answer (2026-06-23) — identical-path fact + the discriminator.** doyle: idle-inject

+and `spt rc` operator-input go through the IDENTICAL single PTY-write seam (broker.rs:994, "the ONE

+place that touches the PTY writer"); `{key:enter}` and a live operator's Enter both become a standalone

+`write_input(b"\r")` — byte-identical. So `{delay_ms}` DOES insert real sleeps (not one batched write;

+"applied atomically" = inject-FLOOR coordination, not a single syscall) — confirming timing was a red

+herring. His discriminator: attach `spt rc call-a` and press Enter; since rc-Enter ≡ inject-`\r`, it

+must behave identically. **Ran it — rc-Enter also did NOT submit** (transcript gained no turn),

+corroborating: CC rejects a raw `\r` over the broker PTY from *every* spt path. So the operator's

+working Enter is a NATIVE CC terminal, not the broker PTY.

+**BREAKTHROUGH — CC negotiates win32-input-mode (root cause).** Captured a fresh `claude.exe`

+v2.1.186 startup under a pywinpty ConPTY (call-a-independent). CC emits at startup:

+ESC[1t   ESC[c   ESC[?1004h   ESC[?9001h

+then stalls awaiting a DA reply (`ESC[c`) the bare ConPTY didn't send. **`ESC[?9001h` = DECSET 9001 =

+win32-input-mode.** With it on, the terminal must deliver keystrokes as win32 key RECORDS

+(`ESC[Vk;Sc;Uc;Kd;Cs;Rc_`), NOT a raw `\r`. That explains the whole matrix: CC parses for win32

+records, so a bare `\r`/`\n`/CSI-u is treated as content (→ newline) and `ctrl+s` (0x13) is swallowed.

+(`ESC[?1004h` = focus reporting, also enabled.) Predicted Enter = down+up records:

+of that record against call-a was INCONCLUSIVE — call-a got repurposed to other work mid-test (window

+changed, draft box cleared) so injection was stopped to avoid disruption. (Audit: NO DIAG probe ever

+submitted anywhere — `grep -rl DIAG-PROBE` over all transcripts is empty — so the probing never

+**Status:** **OPEN — root cause identified, owned by doyle (spt-core broker).** The published

+"enter→`\r` submits" holds ONLY in legacy mode; CC v2.1.186 enables win32-input-mode on Windows

+ConPTY. The broker (which hosts CC via ConPTY on Windows, so call-a almost certainly also enables

+`?9001h`) must (a) answer CC's terminal queries so CC completes its keyboard handshake, and (b) detect

+win32-input-mode (and/or kitty, if negotiated post-DA) and ENCODE `{key:enter}` / `{key:ctrl+s}` as the

+negotiated key records instead of raw `\r` / `0x13`. Handed to doyle to repro under the broker, capture

+the FULL post-DA handshake, and confirm the exact encoding; perri to verify on a fresh endpoint.

+`claude-spt` stays at published v0.6.2 (contract-correct `{text}{key:enter}{commit}` — correct the

+moment the broker encodes keys for the negotiated mode). No adapter-side byte choice can fix this.


Commit + push the F-019 breakthrough:


Bash

cd /c/Users/decid/Documents/projects/spt-claude-code && git status --short && git add docs/SPT-CORE-FINDINGS.md && git commit -q -m "$(cat <<'EOF'
docs(findings): F-019 root cause — CC negotiates win32-input-mode (DECSET 9001)

Captured fresh claude v2.1.186 startup under a ConPTY: it emits
ESC[?9001h (win32-input-mode) + ESC[?1004h (focus). With win32-input-mode
on, keystrokes must be delivered as win32 key records
(ESC[Vk;Sc;Uc;Kd;Cs;Rc_), NOT raw \r — which is exactly why \r/\n/CSI-u
all literalize to a newline and ctrl+s (0x13) is swallowed.

Also ran doyle's rc-Enter discriminator: rc-Enter (same single PTY-write
seam as inject) also fails to submit, confirming it's broker-PTY-wide,
not inject-specific. Root cause owned by spt-core broker: must answer
CC's terminal queries and encode {key:*} for the negotiated input mode.
No DIAG probe ever submitted (verified) — call-a's real work untouched.
Binary stays at published v0.6.2.

Co-authored by: perri
EOF
)" && git push -q origin main && echo pushed

Commit + push F-019 root cause


 M docs/SPT-CORE-FINDINGS.md
pushed


Root cause found. Handed to doyle.

## /diagnose — root cause: **CC negotiates win32-input-mode**

**The smoking gun:** captured a fresh `claude.exe` v2.1.186 startup under a ConPTY — it emits:
```
ESC[1t  ESC[c  ESC[?1004h  ESC[?9001h
```
**`ESC[?9001h` = DECSET 9001 = win32-input-mode.** When on, the terminal must deliver keystrokes as **win32 key records** (`ESC[Vk;Sc;Uc;Kd;Cs;Rc_`), **not** a raw `\r`. That explains the entire matrix: CC is parsing for win32 records, so a bare `\r`/`\n`/CSI-u is just content → newline, and `ctrl+s` (0x13) gets swallowed. Nothing to do with delay or CR-vs-LF.

**Corroborated doyle's discriminator:** idle-inject and `spt rc` operator-input share the *identical* single PTY-write seam (broker.rs:994). Ran `spt rc call-a` + Enter → **also failed to submit** → it's broker-PTY-wide, not inject-specific. The operator's working Enter is a *native* CC terminal, not the broker PTY.

**Fix = doyle's court (spt-core broker):** on Windows the broker hosts CC via ConPTY, so call-a almost certainly enables `?9001h` too. The broker must (a) answer CC's terminal queries so it completes its keyboard handshake, and (b) detect win32-input-mode and **encode `{key:enter}` / `{key:ctrl+s}` as win32 records** instead of raw `\r`/`0x13`. The contract's "enter→`\r` submits" is legacy-mode only. **No adapter byte choice can fix this** — sent doyle the full finding + predicted Enter encoding (`ESC[13;28;13;1;0;1_` down/up); he'll repro under the broker, capture the full post-DA handshake, confirm the exact encoding. I'll verify on a fresh endpoint.

**Cleanup done:**
- Install-dir binary **restored to published v0.6.2** (my diagnostic variants reverted).
- **No DIAG probe ever submitted** anywhere (`grep -rl` over all transcripts is empty) — call-a's real work was never polluted.
- Killed the 3 throwaway capture `claude.exe` I spawned (left call-a/me/psyches running).
- F-019 updated with full matrix + root cause; committed + pushed.

**Heads-up:** call-a's terminal (the "Identify live agent name" tab) now shows different work ("v0.14.1 batch / build assignment #3") with a clean input box — looks like you repurposed it. My win32-Enter test against it was inconclusive for that reason; the root-cause capture didn't need call-a.

Tooling note: installed `pywinpty` (for the ConPTY capture) — harmless, leave or `pip uninstall pywinpty` to remove. Waiting on doyle's broker-side encoding confirmation.