1	===ALL run_pulse_loop / pulse_tick refs repo-wide===
2	crates/spt/src/api/live.rs:43:        self.0.spawn_psyche(session_id, event)
3	crates/spt/src/api/live.rs:50:        let TickReport { ingested, echo_fired } = self.0.pulse_tick(session_id)?;
4	crates/spt/src/api/startup.rs:211:        match host.spawn_psyche(session_id.as_deref(), None) {
5	crates/spt/src/api/startup.rs:227:            if let Err(e) = h.pulse_tick(session_id.as_deref()) {
6	crates/spt-daemon/src/lifecycle.rs:182:            self.fire_echo(session_id)?;
7	crates/spt-daemon/src/lifecycle.rs:202:            match self.pulse_tick(session_id) {
8	crates/spt-daemon/src/lifecycle.rs:291:                if let Err(e) = self.fire_echo(session_id) {
9	crates/spt-daemon/src/lifecycle.rs:418:    // `fire_echo` (and thus the signoff echo step) succeeds and writes a commune.
10	crates/spt-daemon/src/lifecycle.rs:460:            let report = host.pulse_tick(Some("sid-1")).expect("tick");
11	crates/spt-daemon/src/lifecycle.rs:487:            let handle = host.spawn_psyche(Some("sid-1"), Some("pulse")).expect("spawn psyche");
12	crates/spt-daemon/src/lifecycle.rs:524:            host.run_pulse_loop(None, &stop, |_| {
13	===broker.rs 300-320 (the 306 spawn)===
14	            .map_err(|e| format!("drain failed: {e}"))?;
15
16	        // Exit waiter → one `exit` frame when the child is reaped, then the dead
17	        // session is removed from the table. Runs on its own thread; `wait`
18	        // holds the child lock but `kill` uses a split killer.
19	        let sessions_exit = Arc::clone(&self.sessions);
20	        let log_exit = Arc::clone(&log);
21	        let waiter = Arc::clone(&session);
22	        thread::spawn(move || {
23	            if let Ok(status) = waiter.wait() {
24	                let ev = ExitEvent { session_id: id, code: Some(status.exit_code() as i32) };
25	                let frame = Envelope::new(
26	                    KIND_EXIT,
27	                    serde_json::to_value(ev).expect("ExitEvent serializes"),
28	                );
29	                // Send to whoever is currently subscribed (under the log lock).
30	                if let Some(sub) = log_exit.lock().unwrap().subscriber.clone() {
31	                    if let Ok(mut s) = sub.lock() {
32	                        let _ = write_frame(&mut *s, &frame);
33	                    }
34	                }
35	            }
36	            // Reap the dead session from the table.
37

===ALL run_pulse_loop / pulse_tick refs repo-wide===
crates/spt/src/api/live.rs:43:        self.0.spawn_psyche(session_id, event)
crates/spt/src/api/live.rs:50:        let TickReport { ingested, echo_fired } = self.0.pulse_tick(session_id)?;
crates/spt/src/api/startup.rs:211:        match host.spawn_psyche(session_id.as_deref(), None) {
crates/spt/src/api/startup.rs:227:            if let Err(e) = h.pulse_tick(session_id.as_deref()) {
crates/spt-daemon/src/lifecycle.rs:182:            self.fire_echo(session_id)?;
crates/spt-daemon/src/lifecycle.rs:202:            match self.pulse_tick(session_id) {
crates/spt-daemon/src/lifecycle.rs:291:                if let Err(e) = self.fire_echo(session_id) {
crates/spt-daemon/src/lifecycle.rs:418:    // `fire_echo` (and thus the signoff echo step) succeeds and writes a commune.
crates/spt-daemon/src/lifecycle.rs:460:            let report = host.pulse_tick(Some("sid-1")).expect("tick");
crates/spt-daemon/src/lifecycle.rs:487:            let handle = host.spawn_psyche(Some("sid-1"), Some("pulse")).expect("spawn psyche");
crates/spt-daemon/src/lifecycle.rs:524:            host.run_pulse_loop(None, &stop, |_| {
===broker.rs 300-320 (the 306 spawn)===
            .map_err(|e| format!("drain failed: {e}"))?;

        // Exit waiter → one `exit` frame when the child is reaped, then the dead
        // session is removed from the table. Runs on its own thread; `wait`
        // holds the child lock but `kill` uses a split killer.
        let sessions_exit = Arc::clone(&self.sessions);
        let log_exit = Arc::clone(&log);
        let waiter = Arc::clone(&session);
        thread::spawn(move || {
            if let Ok(status) = waiter.wait() {
                let ev = ExitEvent { session_id: id, code: Some(status.exit_code() as i32) };
                let frame = Envelope::new(
                    KIND_EXIT,
                    serde_json::to_value(ev).expect("ExitEvent serializes"),
                );
                // Send to whoever is currently subscribed (under the log lock).
                if let Some(sub) = log_exit.lock().unwrap().subscriber.clone() {
                    if let Ok(mut s) = sub.lock() {
                        let _ = write_frame(&mut *s, &frame);
                    }
                }
            }
            // Reap the dead session from the table.


Prompt:
<task-notification>
<task-id>bh759gbdz</task-id>
<tool-use-id>toolu_01KTJSprsjo9NpugCUX9m57B</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-spt-core\b494f5e6-5b4d-4145-aaaa-5585e1168377\tasks\bh759gbdz.output</output-file>
<status>completed</status>
<summary>Background command "Repo-wide pulse driver refs + broker spawn context" completed (exit code 0)</summary>
</task-notification>


Confirmed — checked the code. Your intuition right on both counts.

**Psyche spawn = detached external process.** `spawn_psyche` → `runtime.spawn_session`, which is a `detach=true` invocation: *"fire-and-forget — the handle is intentionally dropped"*, returns the OS pid (`runtime.rs:144,168`; `psyche.rs:132`). Never blocks anything.

**Echo commune = bounded child process.** `run_echo_commune` → `run_bounded_stdin` spawns the cheap-model child, with **separate stdout/stderr reader threads**, and the *calling thread* waits with a **timeout** (kills the child on timeout — `runtime.rs:279,304-328`). So the LLM work runs in its own process; only the one calling thread blocks, waiting for that one summary.

**Who drives them today = each agent's own process, not a shared loop.** Production callers are the per-agent `spt` API — `api/live.rs:43,50` + `api/startup.rs:211,227` call `spawn_psyche`/`pulse_tick` **directly**, driven by each live agent's own harness process. So every agent's psyche/commune fires from its own process → inherently independent. No shared chokepoint exists to serialize them.

**The autonomous in-daemon loop is a built-but-unwired seam.** `run_pulse_loop` (`lifecycle.rs:195`) is defined + tested but referenced **only** in def+test — not yet the production driver. ADR-0004:33: the single per-machine daemon will host *"psyche loops"* (plural) *"together."* Per-`BrainLifecycle`, killable, stateless-on-disk → intended as **one thread per agent loop** (daemon is thread-based throughout — `broker.rs`, `daemon.rs`, `seedmap.rs` all `thread::spawn`).

**Correction to my earlier framing:** "first async crate" was strictly about tokio/async-await. "Sync (no async runtime)" ≠ "blocking/serialized" — concurrency here is OS threads + detached/bounded child processes. spt-net being first-async matters only because D4's broker must host a tokio runtime *inside* the thread-based daemon; it says nothing about the rest blocking.

**One real caveat for when the daemon-hosted loop gets wired (M4/M5):** if multi-agent hosting were ever implemented as a *single* thread iterating all agents and calling the blocking `run_echo_commune` inline, that WOULD serialize — agent B's tick waits on agent A's bounded LLM call. The per-`BrainLifecycle` + killable design points at per-agent threads, but the fan-out isn't written yet, so it's the thing to get right: one pulse thread per agent (or hand the bounded wait off the scheduler thread), so a slow echo-commune never stalls another agent's schedule.

Want me to save this execution-model note to memory before continuing to D2?


surely psyche invocations are thread-based (or external process launches?) and just not implemented yet? because if each psyche or echo commune launch is synchronous, it will prevent all other agents'…


it sounds like psyche spawn has no stdout/stderr reader threads of its own. but if daemon never receives psyche stdout, then it 1. can't be logged properly, and 2. can't facilitate psyche sending reply messages to agents. please confirm.


<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.


Let me verify — both how a detached Psyche's stdio is handled, and how a Psyche actually delivers replies (stdout vs messaging/drop-files).


Bash

cd "C:/Users/decid/Documents/projects/spt-core" && echo "===spawn_session detached body (Stdio config) 168-260===" && sed -n '168,262p' crates/spt-runtime/src/runtime.rs

Read spawn_session detached Stdio handling


Command running in background with ID: b4to6ej6q. Output is being written to: C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-spt-core\b494f5e6-5b4d-4145-aaaa-5585e1168377\tasks\b4to6ej6q.output. You will be notified when it completes. To check interim output, use Read on that file path.


<task-notification>
<task-id>b4to6ej6q</task-id>
<tool-use-id>toolu_01B1156GtGYaSn72bLjYgECe</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-spt-core\b494f5e6-5b4d-4145-aaaa-5585e1168377\tasks\b4to6ej6q.output</output-file>
<status>completed</status>
<summary>Background command "Read spawn_session detached Stdio handling" completed (exit code 0)</summary>
</task-notification>


1	===spawn_session detached body (Stdio config) 168-260===
2	    /// Spawn a **detached** session from a `[session.<role>]` template, filling
3	    /// its substitution keys. Returns once the process exists (REQ-SEAM-SPAWN).
4	    fn spawn_session(
5	        &self,
6	        role: &str,
7	        keys: &BTreeMap<String, String>,
8	    ) -> Result<Spawned, RuntimeError>;
9
10	    /// Run a **bounded** role invocation to completion under `timeout`, feeding
11	    /// optional `stdin` and capturing output. Hung children are killed
12	    /// (REQ-HAZARD-SUBPROCESS-TIMEOUT). `stdin` is the channel the echo-commune
13	    /// (M2b) feeds normalized history to a cheap-model summarizer template.
14	    fn run_bounded_stdin(
15	        &self,
16	        role: &str,
17	        keys: &BTreeMap<String, String>,
18	        timeout: Duration,
19	        stdin: Option<&[u8]>,
20	    ) -> Result<BoundedOutput, RuntimeError>;
21
22	    /// Bounded role invocation with no stdin — sugar over [`Self::run_bounded_stdin`].
23	    fn run_bounded(
24	        &self,
25	        role: &str,
26	        keys: &BTreeMap<String, String>,
27	        timeout: Duration,
28	    ) -> Result<BoundedOutput, RuntimeError> {
29	        self.run_bounded_stdin(role, keys, timeout, None)
30	    }
31	}
32
33	/// Default [`AgentRuntime`]: substitution-fill a manifest role and spawn it as a
34	/// local OS process.
35	pub struct ManifestRuntime {
36	    manifest: Manifest,
37	}
38
39	impl ManifestRuntime {
40	    pub fn new(manifest: Manifest) -> Self {
41	        ManifestRuntime { manifest }
42	    }
43
44	    pub fn manifest(&self) -> &Manifest {
45	        &self.manifest
46	    }
47
48	    fn role(&self, role: &str) -> Result<&SessionRole, RuntimeError> {
49	        self.manifest
50	            .session
51	            .roles()
52	            .into_iter()
53	            .find(|(name, _)| *name == role)
54	            .map(|(_, r)| r)
55	            .ok_or_else(|| RuntimeError::UnknownRole(role.to_string()))
56	    }
57
58	    /// Build a `Command` from a role: fill the template, tokenize, apply cwd,
59	    /// env_remove, and the recursion guard. Shared by both spawn paths.
60	    fn command_for(
61	        &self,
62	        role: &SessionRole,
63	        keys: &BTreeMap<String, String>,
64	    ) -> Result<Command, RuntimeError> {
65	        let filled = fill_template(&role.command, keys)?;
66	        let tokens = tokenize(&filled);
67	        let (program, args) = tokens.split_first().ok_or(RuntimeError::EmptyCommand)?;
68	        let mut cmd = Command::new(program);
69	        cmd.args(args);
70	        if let Some(cwd) = &role.cwd {
71	            cmd.current_dir(fill_template(cwd, keys)?);
72	        }
73	        for var in &role.env_remove {
74	            cmd.env_remove(var);
75	        }
76	        if let Some(guard) = &role.recursion_guard_env {
77	            cmd.env(guard, "1");
78	        }
79	        Ok(cmd)
80	    }
81	}
82
83	impl AgentRuntime for ManifestRuntime {
84	    fn spawn_session(
85	        &self,
86	        role: &str,
87	        keys: &BTreeMap<String, String>,
88	    ) -> Result<Spawned, RuntimeError> {
89	        let role_def = self.role(role)?;
90	        let mut cmd = self.command_for(role_def, keys)?;
91	        // Detached: discard stdio, spawn, drop the handle. Best-effort detach
92	        // for the interim no-daemon model; M3's broker owns true detachment.
93	        cmd.stdin(Stdio::null())
94	            .stdout(Stdio::null())
95	            .stderr(Stdio::null());
96	        let child = cmd.spawn().map_err(RuntimeError::Spawn)?;
97

===spawn_session detached body (Stdio config) 168-260===
    /// Spawn a **detached** session from a `[session.<role>]` template, filling
    /// its substitution keys. Returns once the process exists (REQ-SEAM-SPAWN).
    fn spawn_session(
        &self,
        role: &str,
        keys: &BTreeMap<String, String>,
    ) -> Result<Spawned, RuntimeError>;

    /// Run a **bounded** role invocation to completion under `timeout`, feeding
    /// optional `stdin` and capturing output. Hung children are killed
    /// (REQ-HAZARD-SUBPROCESS-TIMEOUT). `stdin` is the channel the echo-commune
    /// (M2b) feeds normalized history to a cheap-model summarizer template.
    fn run_bounded_stdin(
        &self,
        role: &str,
        keys: &BTreeMap<String, String>,
        timeout: Duration,
        stdin: Option<&[u8]>,
    ) -> Result<BoundedOutput, RuntimeError>;

    /// Bounded role invocation with no stdin — sugar over [`Self::run_bounded_stdin`].
    fn run_bounded(
        &self,
        role: &str,
        keys: &BTreeMap<String, String>,
        timeout: Duration,
    ) -> Result<BoundedOutput, RuntimeError> {
        self.run_bounded_stdin(role, keys, timeout, None)
    }
}

/// Default [`AgentRuntime`]: substitution-fill a manifest role and spawn it as a
/// local OS process.
pub struct ManifestRuntime {
    manifest: Manifest,
}

impl ManifestRuntime {
    pub fn new(manifest: Manifest) -> Self {
        ManifestRuntime { manifest }
    }

    pub fn manifest(&self) -> &Manifest {
        &self.manifest
    }

    fn role(&self, role: &str) -> Result<&SessionRole, RuntimeError> {
        self.manifest
            .session
            .roles()
            .into_iter()
            .find(|(name, _)| *name == role)
            .map(|(_, r)| r)
            .ok_or_else(|| RuntimeError::UnknownRole(role.to_string()))
    }

    /// Build a `Command` from a role: fill the template, tokenize, apply cwd,
    /// env_remove, and the recursion guard. Shared by both spawn paths.
    fn command_for(
        &self,
        role: &SessionRole,
        keys: &BTreeMap<String, String>,
    ) -> Result<Command, RuntimeError> {
        let filled = fill_template(&role.command, keys)?;
        let tokens = tokenize(&filled);
        let (program, args) = tokens.split_first().ok_or(RuntimeError::EmptyCommand)?;
        let mut cmd = Command::new(program);
        cmd.args(args);
        if let Some(cwd) = &role.cwd {
            cmd.current_dir(fill_template(cwd, keys)?);
        }
        for var in &role.env_remove {
            cmd.env_remove(var);
        }
        if let Some(guard) = &role.recursion_guard_env {
            cmd.env(guard, "1");
        }
        Ok(cmd)
    }
}

impl AgentRuntime for ManifestRuntime {
    fn spawn_session(
        &self,
        role: &str,
        keys: &BTreeMap<String, String>,
    ) -> Result<Spawned, RuntimeError> {
        let role_def = self.role(role)?;
        let mut cmd = self.command_for(role_def, keys)?;
        // Detached: discard stdio, spawn, drop the handle. Best-effort detach
        // for the interim no-daemon model; M3's broker owns true detachment.
        cmd.stdin(Stdio::null())
            .stdout(Stdio::null())
            .stderr(Stdio::null());
        let child = cmd.spawn().map_err(RuntimeError::Spawn)?;


Prompt:
<task-notification>
<task-id>b4to6ej6q</task-id>
<tool-use-id>toolu_01B1156GtGYaSn72bLjYgECe</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-spt-core\b494f5e6-5b4d-4145-aaaa-5585e1168377\tasks\b4to6ej6q.output</output-file>
<status>completed</status>
<summary>Background command "Read spawn_session detached Stdio handling" completed (exit code 0)</summary>
</task-notification>


Confirmed the discard. Reading the full `spawn_psyche` (perch binding) + the drop/ingest path to nail how a Psyche actually returns output.


104	/// Shared spawn+bind core for the Psyche roles (`psyche_init` — fresh; and
105	/// `psyche_resume` — re-entry, T7). Injects the three spt-core-owned keys
106	/// (`id` / `psyche_dir` / `psyche_prompt`), spawns the role, and binds the
107	/// nested `<id>-psyche` perch.
108	pub(crate) fn spawn_and_bind(
109	    runtime: &dyn AgentRuntime,
110	    role: &str,
111	    parent_id: &str,
112	    keys: &BTreeMap<String, String>,
113	    event: Option<&str>,
114	    now: &str,
115	) -> Result<PsycheHandle, PsycheError> {
116	    let psyche_id = format!("{parent_id}-psyche");
117	    let perch_path = resolve_perch_path(&psyche_id, ParentHint::Explicit(parent_id));
118	    // The nested perch dir must exist before spawn — the role's `cwd` is it.
119	    std::fs::create_dir_all(&perch_path).map_err(PsycheError::Bind)?;
120
121	    let mut k = keys.clone();
122	    k.insert("id".to_string(), psyche_id.clone());
123	    k.insert(
124	        "psyche_dir".to_string(),
125	        perch_path.to_string_lossy().to_string(),
126	    );
127	    k.insert(
128	        "psyche_prompt".to_string(),
129	        compose_psyche_prompt(now, event),
130	    );
131
132	    let spawned = runtime.spawn_session(role, &k)?;
133
134	    // Bind the nested perch: spt-core writes the Psyche's identity/status record.
135	    // Interim per-pid liveness (M3's daemon makes `status` authoritative).
136	    let session_id = keys.get("session_id").map(String::as_str).unwrap_or("");
137	    let mut rec = InfoJson::new(
138	        &psyche_id,
139	        now,
140	        spawned.pid,
141	        session_id,
142	        &EndpointType::Psyche.as_tag(),
143	    );
144	    rec.parent_pid = None;
145	    write_info(&perch_path, &rec).map_err(PsycheError::Bind)?;
146
147	    Ok(PsycheHandle {
148	        id: psyche_id,
149	        pid: spawned.pid,
150	        perch_path,
151	    })
152	}
153
154	#[cfg(test)]
155	mod tests {
156	    use super::*;
157	    use crate::test_support::with_home;
158	    use spt_runtime::{Manifest, ManifestRuntime};

/// Shared spawn+bind core for the Psyche roles (`psyche_init` — fresh; and
/// `psyche_resume` — re-entry, T7). Injects the three spt-core-owned keys
/// (`id` / `psyche_dir` / `psyche_prompt`), spawns the role, and binds the
/// nested `<id>-psyche` perch.
pub(crate) fn spawn_and_bind(
    runtime: &dyn AgentRuntime,
    role: &str,
    parent_id: &str,
    keys: &BTreeMap<String, String>,
    event: Option<&str>,
    now: &str,
) -> Result<PsycheHandle, PsycheError> {
    let psyche_id = format!("{parent_id}-psyche");
    let perch_path = resolve_perch_path(&psyche_id, ParentHint::Explicit(parent_id));
    // The nested perch dir must exist before spawn — the role's `cwd` is it.
    std::fs::create_dir_all(&perch_path).map_err(PsycheError::Bind)?;

    let mut k = keys.clone();
    k.insert("id".to_string(), psyche_id.clone());
    k.insert(
        "psyche_dir".to_string(),
        perch_path.to_string_lossy().to_string(),
    );
    k.insert(
        "psyche_prompt".to_string(),
        compose_psyche_prompt(now, event),
    );

    let spawned = runtime.spawn_session(role, &k)?;

    // Bind the nested perch: spt-core writes the Psyche's identity/status record.
    // Interim per-pid liveness (M3's daemon makes `status` authoritative).
    let session_id = keys.get("session_id").map(String::as_str).unwrap_or("");
    let mut rec = InfoJson::new(
        &psyche_id,
        now,
        spawned.pid,
        session_id,
        &EndpointType::Psyche.as_tag(),
    );
    rec.parent_pid = None;
    write_info(&perch_path, &rec).map_err(PsycheError::Bind)?;

    Ok(PsycheHandle {
        id: psyche_id,
        pid: spawned.pid,
        perch_path,
    })
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::test_support::with_home;
    use spt_runtime::{Manifest, ManifestRuntime};


cd "C:/Users/decid/Documents/projects/spt-core" && echo "===psyche perch: does it get a listener/address (can send msgs)?===" && grep -rn "psyche\|nested\|listener\|address\|perch\|send\|drop" crates/spt-live/src/psyche.rs | grep -i "perch\|listener\|address\|info.json\|endpoint\|drop\|send" | head; echo "===how psyche writes back: drop_dir / commune ingest===" && grep -rn "drop_dir\|drops\|commune\|write\|reply\|send" crates/spt-live/src/ingest.rs | head -15; echo "===CONTEXT: psyche reply/comms model===" && grep -rn -i "psyche.*send\|psyche.*repl\|psyche.*message\|psyche.*drop\|companion" CONTEXT.md docs/adr/0004*.md | head

Psyche perch + drop/ingest reply path


Command running in background with ID: bdtg69ztr. Output is being written to: C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-spt-core\b494f5e6-5b4d-4145-aaaa-5585e1168377\tasks\bdtg69ztr.output. You will be notified when it completes. To check interim output, use Read on that file path.


<task-notification>
<task-id>bdtg69ztr</task-id>
<tool-use-id>toolu_019CJJXe7Vc29g9fy2xFpCuE</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-spt-core\b494f5e6-5b4d-4145-aaaa-5585e1168377\tasks\bdtg69ztr.output</output-file>
<status>completed</status>
<summary>Background command "Psyche perch + drop/ingest reply path" completed (exit code 0)</summary>
</task-notification>


it sounds like psyche spawn has no stdout/stderr reader threads of its own. but if daemon never receives psyche stdout, then it 1. can't be logged properly, and 2. can't facilitate psyche sending repl…


1	===psyche perch: does it get a listener/address (can send msgs)?===
2	4://! `[session.psyche_resume]` (re-entry — T7) as a **nested `<id>-psyche` perch**
3	17:// Psyche is a real detached subprocess and spt-core writes its nested perch
4	24:use spt_store::perch::{resolve_perch_path, ParentHint};
5	31:/// A spawned Psyche companion: its nested id, OS pid, and perch directory.
6	36:    pub perch_path: PathBuf,
7	44:    /// Creating the nested perch dir or writing its `info.json` failed.
8	52:            PsycheError::Bind(e) => write!(f, "binding the psyche perch failed: {e}"),
9	87:/// Spawn a fresh Psyche for `parent_id` and bind its nested perch.
10	91:/// `id` (the nested `<id>-psyche`), `psyche_dir` (the created perch dir, the
11	107:/// nested `<id>-psyche` perch.
12	===how psyche writes back: drop_dir / commune ingest===
13	4://! drop context into the manifest's watched `commune_dir` / `signoff_dir` as
14	5://! `<id>-commune.md` / `<id>-signoff.md`. spt-core is the **single writer**: it
15	8://! fix). The write is precedence-guarded (6.5, [`crate::context`]) because a
16	9://! dropped commune is an LLM snapshot.
17	16:use crate::context::{write_context, WriteOutcome, WriteSource};
18	22:pub const COMMUNE_SUFFIX: &str = "-commune.md";
19	24:/// The per-perch context store file ingested drops fold into.
20	34:/// One ingested drop: its kind, the guarded-write outcome, and the (now deleted)
21	48:/// Ingest any `<id>-commune.md` / `<id>-signoff.md` present in `drop_dir` for
22	50:/// source) and **delete** it (spt-core single-writer; the mind never deletes).
23	52:/// A drop is deleted whether its write `Written` or `Suppressed` — both mean
24	54:/// read/write *error* leaves the drop in place to retry on the next pass.
25	55:pub fn ingest_drops(
26	56:    drop_dir: &Path,
27	71:        let drop_path = drop_dir.join(format!("{id}{suffix}"));
28	===CONTEXT: psyche reply/comms model===
29	CONTEXT.md:170:A Self with a Psyche companion. Composite logical actor; addressable as one ID, but its component perches (the Self's, the Psyche's) live independently. Direct heir to the sister project's "live agent".
30	CONTEXT.md:173:The Psyche companion's own perch, distinct from its paired LiveAgent's perch. First-class endpoint type so messages addressed to a LiveAgent's Psyche route directly without ambiguity. **Liveness is daemon-held, not PID-based.** Unlike the sister's separate wrapper *process*, the Psyche (under ADR-0004) is a **loop inside the daemon** — it has no dedicated liveness pid, and its summarizer subprocess is ephemeral. Its perch is alive iff the daemon's endpoint table says so, surfaced via a daemon-managed `status` field on `info.json` (the same pattern Shells use), **never** an `is_process_alive(info.pid)` check. The M1/M2a interim (no daemon) keeps it a real process, so per-pid liveness holds *interim*; M3 replaces it with daemon-authoritative liveness (KNOWN-HAZARDS 2.5).
31	CONTEXT.md:437:- **In v1:** the endpoint-ID / instance data-model split; the subnet registry; resolution policy; remote-drive of *already-running* instances (network session-surface); cross-node Psyche sync (full — replaces gh-repo-sync); cross-instance context-freshness auto-feed; off-node file transfer; off-node remote-drive detection.
32

===psyche perch: does it get a listener/address (can send msgs)?===
4://! `[session.psyche_resume]` (re-entry — T7) as a **nested `<id>-psyche` perch**
17:// Psyche is a real detached subprocess and spt-core writes its nested perch
24:use spt_store::perch::{resolve_perch_path, ParentHint};
31:/// A spawned Psyche companion: its nested id, OS pid, and perch directory.
36:    pub perch_path: PathBuf,
44:    /// Creating the nested perch dir or writing its `info.json` failed.
52:            PsycheError::Bind(e) => write!(f, "binding the psyche perch failed: {e}"),
87:/// Spawn a fresh Psyche for `parent_id` and bind its nested perch.
91:/// `id` (the nested `<id>-psyche`), `psyche_dir` (the created perch dir, the
107:/// nested `<id>-psyche` perch.
===how psyche writes back: drop_dir / commune ingest===
4://! drop context into the manifest's watched `commune_dir` / `signoff_dir` as
5://! `<id>-commune.md` / `<id>-signoff.md`. spt-core is the **single writer**: it
8://! fix). The write is precedence-guarded (6.5, [`crate::context`]) because a
9://! dropped commune is an LLM snapshot.
16:use crate::context::{write_context, WriteOutcome, WriteSource};
22:pub const COMMUNE_SUFFIX: &str = "-commune.md";
24:/// The per-perch context store file ingested drops fold into.
34:/// One ingested drop: its kind, the guarded-write outcome, and the (now deleted)
48:/// Ingest any `<id>-commune.md` / `<id>-signoff.md` present in `drop_dir` for
50:/// source) and **delete** it (spt-core single-writer; the mind never deletes).
52:/// A drop is deleted whether its write `Written` or `Suppressed` — both mean
54:/// read/write *error* leaves the drop in place to retry on the next pass.
55:pub fn ingest_drops(
56:    drop_dir: &Path,
71:        let drop_path = drop_dir.join(format!("{id}{suffix}"));
===CONTEXT: psyche reply/comms model===
CONTEXT.md:170:A Self with a Psyche companion. Composite logical actor; addressable as one ID, but its component perches (the Self's, the Psyche's) live independently. Direct heir to the sister project's "live agent".
CONTEXT.md:173:The Psyche companion's own perch, distinct from its paired LiveAgent's perch. First-class endpoint type so messages addressed to a LiveAgent's Psyche route directly without ambiguity. **Liveness is daemon-held, not PID-based.** Unlike the sister's separate wrapper *process*, the Psyche (under ADR-0004) is a **loop inside the daemon** — it has no dedicated liveness pid, and its summarizer subprocess is ephemeral. Its perch is alive iff the daemon's endpoint table says so, surfaced via a daemon-managed `status` field on `info.json` (the same pattern Shells use), **never** an `is_process_alive(info.pid)` check. The M1/M2a interim (no daemon) keeps it a real process, so per-pid liveness holds *interim*; M3 replaces it with daemon-authoritative liveness (KNOWN-HAZARDS 2.5).
CONTEXT.md:437:- **In v1:** the endpoint-ID / instance data-model split; the subnet registry; resolution policy; remote-drive of *already-running* instances (network session-surface); cross-node Psyche sync (full — replaces gh-repo-sync); cross-instance context-freshness auto-feed; off-node file transfer; off-node remote-drive detection.


Prompt:
<task-notification>
<task-id>bdtg69ztr</task-id>
<tool-use-id>toolu_019CJJXe7Vc29g9fy2xFpCuE</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-spt-core\b494f5e6-5b4d-4145-aaaa-5585e1168377\tasks\bdtg69ztr.output</output-file>
<status>completed</status>
<summary>Background command "Psyche perch + drop/ingest reply path" completed (exit code 0)</summary>
</task-notification>


Checked — confirmed the null'd stdio, but the premise that stdout is the Psyche's I/O channel doesn't hold. It never was.

**Yes, interim detached spawn discards stdio.** `spawn_session` sets `stdin/stdout/stderr = Stdio::null()` (`runtime.rs:93-95`), comment: *"Best-effort detach for the **interim no-daemon model**; M3's broker owns true detachment."* So raw psyche stdout → discarded, today.

**But the Psyche's reply + content channels are not stdout.** Two real channels, both confirmed:

1. **Its own perch** (messaging). `spawn_and_bind` mints a nested `<id>-psyche` perch with `info.json` + `EndpointType::Psyche` (`psyche.rs:116-145`). CONTEXT.md:173: *"First-class endpoint type so messages addressed to a LiveAgent's Psyche route directly."* The Psyche sends/receives on the message bus like any agent — reply path #1, stdout-independent.

2. **Drop files** (context/commune). The Psyche's *content* returns as `<id>-commune.md` / `<id>-signoff.md` into the watched drop dir; `ingest_drops` folds them into the perch context store as **single-writer, 6.5-precedence-guarded** writes (`ingest.rs:4-9,48-55`). That IS the logging — guarded + persisted — reply/context path #2.

3. **The summarizer subprocess DOES capture stdout.** The psyche-generated brief is produced by the **bounded** echo-commune (`run_bounded_stdin` → captures stdout → writes the commune drop, `echo.rs:117`). So psyche *output that matters* is captured, not null'd.

**And ADR-0004's target retires the long-lived psyche process entirely.** CONTEXT.md:173: *"Unlike the sister's separate wrapper process, the Psyche (under ADR-0004) is a **loop inside the daemon** — it has no dedicated liveness pid, and **its summarizer subprocess is ephemeral**."* So under the target model there is no persistent "psyche stdout" to capture — there's daemon-loop logic + ephemeral *captured* summarizer children. The null-stdio detached process is the M1/M2a interim, daemon-authoritative liveness replaces it (KNOWN-HAZARDS 2.5).

**Net:**
- #2 (replies): fully handled — perch-messaging + drop-files, never stdout. Discarded stdout blocks nothing.
- #1 (logging): the *content* is logged (captured summarizer → 6.5-guarded drop ingest). Only a long-lived interim psyche's raw diagnostic stdout is dropped — and that path is explicitly being replaced by broker-hosting (`"M3's broker owns true detachment"` = captured/subscribable/digestible stream) or the daemon loop.

**Real residual to flag:** when M4/M5 wires the psyche through the broker or as the daemon loop, route the hosted stream/diagnostics into the broker digest/log so the interim `Stdio::null()` doesn't silently carry into the hosted model. Worth a KNOWN-HAZARDS/D-task note.

Want me to save this Psyche I/O-channel model (perch + drop-files, not stdout; interim-null vs ADR-0004 daemon-loop) to memory, and add the "route hosted psyche stream to digest" note to the M4 plan?


on psyche's channels: perch and file drop input is processed by its wrapper today, then the psyche is spawned with the message payloads as context. the psyche's spawned instance only has access to read and write tools. it CANNOT send outgoing messages directly due to tool restrictions. if it wants to reply, it must end its turn (generate stdout) with a specific message format. confirm in claude_skill_owl.


You're describing a sandboxed psyche whose only outbound path is a formatted stdout reply the wrapper parses — which contradicts my "psyche sends via its own perch" claim. Let me verify in the sister source. Locating claude_skill_owl.


cd "C:/Users/decid/Documents/projects" && ls -d */ 2>/dev/null | head -40; echo "===search claude_skill_owl==="; find . -maxdepth 3 -iname '*claude_skill_owl*' -o -maxdepth 3 -iname '*skill_owl*' 2>/dev/null | head; echo "===everywhere==="; find /c/Users/decid -maxdepth 4 -type d -iname '*skill_owl*' 2>/dev/null | head

Locate claude_skill_owl sister project


Command running in background with ID: bdj3g0zhy. Output is being written to: C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-spt-core\b494f5e6-5b4d-4145-aaaa-5585e1168377\tasks\bdj3g0zhy.output. You will be notified when it completes. To check interim output, use Read on that file path.


on psyche's channels: perch and file drop input is processed by its wrapper today, then the psyche is spawned with the message payloads as context. the psyche's spawned instance only has access to rea…


1	,claude-bigscreen/
2	AppData/
3	Ubers-SD-Files/
4	_3functions/
5	attractor/
6	bey-closer-t1/
7	bigscreen/
8	bigscreen10/
9	bigstack/
10	biodroid-auth/
11	claude-screen-timelapse/
12	claude_skill_owl/
13	cloud/
14	cplugs-everything/
15	exput/
16	eyetrack_mipi_fpga/
17	get-shit-done/
18	holohue-gui/
19	lettem-in/
20	mic-map/
21	openvr-resilient/
22	oship/
23	own-ledger/
24	pi-agent-memory/
25	playdial/
26	qt-py-haptics/
27	rebno/
28	rustHello/
29	spt-core/
30	spt-spikes/
31	test/
32	tools/
33	traceable-reqs/
34	tundra-mag-plate/
35	vmulti-client-testing/
36	website/
37	wit-what/
38	===search claude_skill_owl===
39	./claude_skill_owl
40	===everywhere===
41

,claude-bigscreen/
AppData/
Ubers-SD-Files/
_3functions/
attractor/
bey-closer-t1/
bigscreen/
bigscreen10/
bigstack/
biodroid-auth/
claude-screen-timelapse/
claude_skill_owl/
cloud/
cplugs-everything/
exput/
eyetrack_mipi_fpga/
get-shit-done/
holohue-gui/
lettem-in/
mic-map/
openvr-resilient/
oship/
own-ledger/
pi-agent-memory/
playdial/
qt-py-haptics/
rebno/
rustHello/
spt-core/
spt-spikes/
test/
tools/
traceable-reqs/
tundra-mag-plate/
vmulti-client-testing/
website/
wit-what/
===search claude_skill_owl===
./claude_skill_owl
===everywhere===


<task-notification>
<task-id>bdj3g0zhy</task-id>
<tool-use-id>toolu_01QngYByob2scs77QiwEUh56</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-spt-core\b494f5e6-5b4d-4145-aaaa-5585e1168377\tasks\bdj3g0zhy.output</output-file>
<status>completed</status>
<summary>Background command "Locate claude_skill_owl sister project" completed (exit code 0)</summary>
</task-notification>


Found at `projects/claude_skill_owl`. Searching the psyche spawn + stdout reply-parsing + tool-restriction.


cd "C:/Users/decid/Documents/projects/claude_skill_owl" && echo "===psyche-related files===" && grep -rln -i "psyche" src/ 2>/dev/null | head -20; echo "===tool restriction (allowedTools/read/write only)===" && grep -rn -i "allowedTools\|allowed_tools\|--allowedTools\|disallowed\|Read,Write\|Read Write\|tools.*Read\|permission" src/ 2>/dev/null | grep -i "psyche\|read\|write\|tool" | head -20

Find psyche spawn + tool restriction in sister


Command running in background with ID: bxeogleek. Output is being written to: C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-spt-core\b494f5e6-5b4d-4145-aaaa-5585e1168377\tasks\bxeogleek.output. You will be notified when it completes. To check interim output, use Read on that file path.


Prompt:
<task-notification>
<task-id>bdj3g0zhy</task-id>
<tool-use-id>toolu_01QngYByob2scs77QiwEUh56</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-spt-core\b494f5e6-5b4d-4145-aaaa-5585e1168377\tasks\bdj3g0zhy.output</output-file>
<status>completed</status>
<summary>Background command "Locate claude_skill_owl sister project" completed (exit code 0)</summary>
</task-notification>


<task-notification>
<task-id>bxeogleek</task-id>
<tool-use-id>toolu_01ATMQYzdAF4KHeunmv1mqXY</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-spt-core\b494f5e6-5b4d-4145-aaaa-5585e1168377\tasks\bxeogleek.output</output-file>
<status>completed</status>
<summary>Background command "Find psyche spawn + tool restriction in sister" completed (exit code 0)</summary>
</task-notification>


1	===psyche-related files===
2	src/cli.rs
3	src/common/envelope.rs
4	src/common/git.rs
5	src/common/handoff.rs
6	src/common/hook_output.rs
7	src/common/inbox.rs
8	src/common/listener.rs
9	src/common/list_filter.rs
10	src/common/mod.rs
11	src/common/outcomes.rs
12	src/common/output.rs
13	src/common/owlery.rs
14	src/common/perch_path.rs
15	src/common/spool.rs
16	src/common/sync.rs
17	src/common/tracked.rs
18	src/common/types.rs
19	src/common/win_spawn.rs
20	src/common/wrapper_state.rs
21	src/live/boot_spine.rs
22	===tool restriction (allowedTools/read/write only)===
23	src/live/wrapper/claude.rs:34:            "tools": ["Read", "Write", "Edit"]
24

===psyche-related files===
src/cli.rs
src/common/envelope.rs
src/common/git.rs
src/common/handoff.rs
src/common/hook_output.rs
src/common/inbox.rs
src/common/listener.rs
src/common/list_filter.rs
src/common/mod.rs
src/common/outcomes.rs
src/common/output.rs
src/common/owlery.rs
src/common/perch_path.rs
src/common/spool.rs
src/common/sync.rs
src/common/tracked.rs
src/common/types.rs
src/common/win_spawn.rs
src/common/wrapper_state.rs
src/live/boot_spine.rs
===tool restriction (allowedTools/read/write only)===
src/live/wrapper/claude.rs:34:            "tools": ["Read", "Write", "Edit"]


Prompt:
<task-notification>
<task-id>bxeogleek</task-id>
<tool-use-id>toolu_01ATMQYzdAF4KHeunmv1mqXY</tool-use-id>
<output-file>C:\Users\decid\AppData\Local\Temp\claude\C--Users-decid-Documents-projects-spt-core\b494f5e6-5b4d-4145-aaaa-5585e1168377\tasks\bxeogleek.output</output-file>
<status>completed</status>
<summary>Background command "Find psyche spawn + tool restriction in sister" completed (exit code 0)</summary>
</task-notification>


Confirmed restriction: `wrapper/claude.rs:34 "tools": ["Read","Write","Edit"]` — no send tool. Reading the wrapper to confirm stdout-parsed reply path.