---
phase: 09-timing-profiles
verified: 2026-04-13T12:00:00Z
status: human_needed
score: 12/12
overrides_applied: 0
human_verification:
  - test: "Call save_timing_profile with name='test-fast' interval_ms=300 max_frames=10, then call start_capture with timing_profile='test-fast' and no interval_ms — verify capture uses 300ms interval"
    expected: "Capture runs with 300ms interval from the timing profile"
    why_human: "Requires running MCP server and verifying actual capture behavior end-to-end"
  - test: "Call start_capture with timing_profile='quick-glance' (builtin) and no other params except target='desktop'"
    expected: "Capture starts with 500ms interval and max 6 frames from the quick-glance preset"
    why_human: "Requires running MCP server; verifies builtins are resolvable in start_capture"
  - test: "Call start_capture with timing_profile='debug-flicker' and delta_highlight=false to override the profile's true"
    expected: "Capture runs without delta highlighting despite the profile having deltaHighlight: true"
    why_human: "Requires running MCP server; verifies boolean override semantics with nullish coalescing"
  - test: "Call start_capture with both screenshot_profile and timing_profile simultaneously"
    expected: "Target params from screenshot profile and timing params from timing profile are both applied"
    why_human: "Requires running MCP server with saved profiles; verifies combined resolution"
---

# Phase 9: Timing Profiles Verification Report

**Phase Goal:** Per-project named timing profiles with built-in presets, diagnostic flags, and parameter summaries. Three new MCP tools (save/list/delete) plus timing_profile param on start_capture with merge semantics.
**Verified:** 2026-04-13T12:00:00Z
**Status:** human_needed
**Re-verification:** No -- initial verification

## Goal Achievement

### Observable Truths

| # | Truth | Status | Evidence |
|---|-------|--------|----------|
| 1 | TimingProfile interface exists with all 13 fields from D-04 | VERIFIED | `src/profiles/profile-types.ts` lines 34-48: slug, displayName, intervalMs, maxFrames, durationMs, jpegQuality, deltaHighlight, compressIdle, gifExport, description, createdAt, updatedAt, builtin -- all timing/diagnostic fields optional |
| 2 | ProfileManager can CRUD timing profiles in the same JSON file under the 'timing' key | VERIFIED | `src/profiles/profile-manager.ts` has saveTiming (line 229), getTiming (line 261), deleteTiming (line 272), listTiming (line 293), saveTimingFromSession (line 318). persist() writes `timing: Object.fromEntries(this.timingProfiles)` at line 103 |
| 3 | Four built-in presets (quick-glance, steady-watch, debug-flicker, slow-monitor) available without any prior save call | VERIFIED | `src/profiles/timing-presets.ts` lines 13-62: all four presets with exact D-13 values. getTiming falls through to BUILTIN_TIMING_PRESETS on line 265 |
| 4 | User profiles shadow built-in names when both exist | VERIFIED | getTiming checks user map first (line 263), returns builtin only if user not found (line 265). listTiming excludes builtins when userSlugs.has(slug) (line 300) |
| 5 | generateParameterSummary produces human-readable one-liners for timing profiles | VERIFIED | `src/profiles/timing-presets.ts` lines 73-98: formats interval, frames, duration, quality, flags into comma-separated string |
| 6 | Agent can save a timing profile via save_timing_profile MCP tool | VERIFIED | `src/server.ts` line 1032: tool registered with name, interval_ms, max_frames, duration_ms, jpeg_quality, delta_highlight, compress_idle, gif_export, description, source_session params |
| 7 | Agent can list all timing profiles (user + builtin) via list_timing_profiles MCP tool | VERIFIED | `src/server.ts` line 1112: calls profileManager.listTiming() and appends parameter_summary per profile |
| 8 | Agent can delete a user timing profile via delete_timing_profile MCP tool | VERIFIED | `src/server.ts` line 1140: calls profileManager.deleteTiming(), returns specific "Cannot delete built-in preset" error for builtins (line 1170) |
| 9 | Agent can use timing_profile param in start_capture to apply a timing preset | VERIFIED | `src/server.ts` line 158: timing_profile optional string in inputSchema. Resolution block at lines 176-205 loads profile and merges via resolveTimingProfile |
| 10 | Inline params override timing profile values in start_capture | VERIFIED | resolveTimingProfile uses `??` (nullish coalescing) at `src/profiles/profile-resolver.ts` lines 83-89, inline params passed first. Strips undefined via Object.fromEntries filter (line 92-94) |
| 11 | Both screenshot_profile and timing_profile can be used together without conflict | VERIFIED | Timing resolution (line 176) runs before screenshot resolution (line 208) in start_capture handler. Non-overlapping parameter domains: timing covers interval/frames/quality/flags, screenshot covers target/window/region |
| 12 | Missing timing profile returns structured error with available profile names | VERIFIED | `src/server.ts` lines 180-192: returns error with `available_timing_profiles` array from listTiming() |

**Score:** 12/12 truths verified

### Required Artifacts

| Artifact | Expected | Status | Details |
|----------|----------|--------|---------|
| `src/profiles/profile-types.ts` | TimingProfile interface, updated ProfilesFileData | VERIFIED | TimingProfile (line 34), SaveTimingProfileInput (line 53), ProfilesFileData.timing typed as Record<string, TimingProfile> (line 71) |
| `src/profiles/profile-manager.ts` | Timing profile CRUD methods on ProfileManager | VERIFIED | 5 new methods: saveTiming, getTiming, deleteTiming, listTiming, saveTimingFromSession. Imports TimingProfile, SaveTimingProfileInput, BUILTIN_TIMING_PRESETS |
| `src/profiles/timing-presets.ts` | Built-in presets and parameter summary generator | VERIFIED | BUILTIN_TIMING_PRESETS with 4 entries, generateParameterSummary function |
| `src/profiles/profile-resolver.ts` | resolveTimingProfile function alongside existing resolveScreenshotProfile | VERIFIED | ResolvedTimingParams interface (line 61), resolveTimingProfile function (line 78). resolveScreenshotProfile unchanged (line 38) |
| `src/server.ts` | Three new MCP tools + timing_profile param on start_capture | VERIFIED | save_timing_profile (line 1032), list_timing_profiles (line 1112), delete_timing_profile (line 1140), timing_profile param (line 158) |

### Key Link Verification

| From | To | Via | Status | Details |
|------|----|-----|--------|---------|
| profile-manager.ts | profile-types.ts | imports TimingProfile | WIRED | Line 10-14: imports TimingProfile, SaveTimingProfileInput, ProfilesFileData |
| profile-manager.ts | timing-presets.ts | imports BUILTIN_TIMING_PRESETS | WIRED | Line 16: `import { BUILTIN_TIMING_PRESETS } from "./timing-presets.js"` |
| server.ts | profile-manager.ts | profileManager.saveTiming/getTiming/listTiming/deleteTiming | WIRED | Lines 177-204 (start_capture), 1053-1104 (save), 1121-1134 (list), 1149-1189 (delete) |
| server.ts | profile-resolver.ts | resolveTimingProfile call in start_capture | WIRED | Line 24: import, Line 194: called with timing profile and inline args |
| server.ts | timing-presets.ts | generateParameterSummary + BUILTIN_TIMING_PRESETS | WIRED | Line 25: import. Used at lines 1067, 1103, 1126 (summary), BUILTIN_TIMING_PRESETS not directly used in server.ts (handled inside ProfileManager.getTiming) |

### Data-Flow Trace (Level 4)

| Artifact | Data Variable | Source | Produces Real Data | Status |
|----------|---------------|--------|--------------------|--------|
| profile-manager.ts saveTiming | timingProfiles Map | File I/O via load() + user input | Yes -- reads/writes profiles.json | FLOWING |
| profile-manager.ts getTiming | timingProfiles Map + BUILTIN_TIMING_PRESETS | File + hardcoded constants | Yes -- user profiles from disk, builtins from code | FLOWING |
| server.ts start_capture timing resolution | resolvedArgs | resolveTimingProfile output | Yes -- feeds into CaptureConfig construction at line 393 | FLOWING |
| server.ts save_timing_profile | profileManager.saveTiming result | ProfileManager CRUD | Yes -- returns saved profile object with parameter_summary | FLOWING |

### Behavioral Spot-Checks

| Behavior | Command | Result | Status |
|----------|---------|--------|--------|
| TypeScript compiles cleanly | `npx tsc --noEmit` | Exit 0, no errors | PASS |
| 9 tools registered total | grep count of registerTool in server.ts | 9 tool registrations found (6 existing + 3 new) | PASS |
| timing_profile param in start_capture schema | grep in server.ts | Found at line 158 | PASS |
| CaptureConfig reads from resolvedArgs | grep resolvedArgs in server.ts | All timing fields read from resolvedArgs (lines 374-407) | PASS |

### Requirements Coverage

Phase 9 requirements are defined as context decisions D-01 through D-17 (no formal REQ IDs in REQUIREMENTS.md for v1.2 phases).

| Requirement | Source Plan | Description | Status | Evidence |
|-------------|------------|-------------|--------|----------|
| D-01 | 01, 02 | Same JSON file, "timing" key | SATISFIED | ProfilesFileData.timing in profile-types.ts; persist() writes both keys |
| D-02 | 01 | Save overwrites silently, preserves createdAt | SATISFIED | saveTiming checks existing?.createdAt (line 248) |
| D-03 | 01 | Case-insensitive slugified names | SATISFIED | slugify() called in saveTiming (line 231) |
| D-04 | 01 | All specified fields on TimingProfile | SATISFIED | 13 fields present in interface |
| D-05 | 01 | Diagnostic flags included as optional | SATISFIED | deltaHighlight, compressIdle, gifExport all optional booleans |
| D-06 | 01 | All timing params optional (partial presets) | SATISFIED | All timing/diagnostic fields have `?` modifier |
| D-07 | 02 | Three new MCP tools | SATISFIED | save_timing_profile, list_timing_profiles, delete_timing_profile registered |
| D-08 | 02 | Snake_case params matching start_capture | SATISFIED | interval_ms, max_frames, etc. in tool schemas |
| D-09 | 02 | Validation ranges match start_capture | SATISFIED | z.number().min(100) for interval_ms, z.number().min(1).max(50) for max_frames, etc. |
| D-10 | 02 | timing_profile param on start_capture | SATISFIED | Optional string param at line 158 |
| D-11 | 02 | Both profiles work together | SATISFIED | Timing resolved first (line 176), screenshot second (line 208), non-overlapping domains |
| D-12 | 02 | Missing profile returns structured error with names | SATISFIED | Error response at lines 182-192 includes available_timing_profiles |
| D-13 | 01 | Four built-in presets with exact values | SATISFIED | BUILTIN_TIMING_PRESETS in timing-presets.ts matches D-13 spec exactly |
| D-14 | 01, 02 | Builtins listed with builtin:true, user shadows | SATISFIED | listTiming merges and filters; getTiming checks user first |
| D-15 | 01 | Immediately useful without setup | SATISFIED | Built-in presets resolvable via getTiming without any save call |
| D-16 | 02 | source_session auto-populates from session config | SATISFIED | saveTimingFromSession (line 318) + source_session in save_timing_profile tool |
| D-17 | 01, 02 | parameter_summary in list output | SATISFIED | generateParameterSummary called per profile in list_timing_profiles (line 1126) |

### Anti-Patterns Found

| File | Line | Pattern | Severity | Impact |
|------|------|---------|----------|--------|
| (none) | - | - | - | No anti-patterns found in any modified file |

### Human Verification Required

### 1. Timing Profile Applied in Capture

**Test:** Call save_timing_profile with name='test-fast' interval_ms=300 max_frames=10, then call start_capture with timing_profile='test-fast' and target='desktop' (no inline interval_ms).
**Expected:** Capture runs with 300ms interval and max 10 frames from the timing profile.
**Why human:** Requires running MCP server and verifying actual capture behavior end-to-end.

### 2. Built-in Preset Resolution in start_capture

**Test:** Call start_capture with timing_profile='quick-glance' (builtin) and target='desktop' only.
**Expected:** Capture starts with 500ms interval and max 6 frames from the quick-glance preset.
**Why human:** Requires running MCP server; verifies builtins are resolvable in start_capture without prior save.

### 3. Boolean Override with Nullish Coalescing

**Test:** Call start_capture with timing_profile='debug-flicker' and delta_highlight=false to override the profile's true value.
**Expected:** Capture runs without delta highlighting despite the profile having deltaHighlight: true.
**Why human:** Requires running MCP server; verifies explicit false is not lost by nullish coalescing.

### 4. Combined Screenshot + Timing Profile

**Test:** Save a screenshot profile targeting a specific window, save a timing profile with interval_ms=1000. Call start_capture with both screenshot_profile and timing_profile.
**Expected:** Capture uses the window target from screenshot profile AND the 1000ms interval from timing profile.
**Why human:** Requires running MCP server with saved profiles; verifies combined resolution of non-overlapping domains.

### Gaps Summary

No gaps found. All 12 observable truths verified across 5 artifacts with complete wiring. All 17 context decisions (D-01 through D-17) satisfied. TypeScript compiles cleanly. No anti-patterns detected.

Phase 9 additionally completed work that was planned for Phase 10 (wiring timing_profile and screenshot_profile into start_capture), which means Phase 10 may require scope adjustment.

---

_Verified: 2026-04-13T12:00:00Z_
_Verifier: Claude (gsd-verifier)_