fix: exclude fleet-owned queue tasks from session-close's in-progress gate

[bborbe]

What

session-close Phase 4.5 no longer hard-flags a bot-created queue task the session merely nudged.

Why

Phase 4.5's in-progress gate counts any vault-cli task set as "touched". A session that parks a dispatch loop or re-drives a probe writes exactly that — assignee: "" or assignee: sentry-fix-agent on an Analyze Sentry issue … alert — and the file then reads as a touched, in_progress task. The gate has no lever for it but a status flip, which changes nothing real, so the operator is asked to adjudicate the fleet's queue before the verdict can go clean.

Observed 2026-09-14: closing a session whose own anchor was already completed forced the operator to resolve two parked sentry-fix probes (NUKE-DEV-EY, NUKE-PROD-BX) — a reply spent on work that was never that session's.

Change

Such a task is excluded on the same terms as the existing created-this-session exclusion: no claude_session_id naming this session, not created here, and carrying a producer's task_type. If either of the first two fails, it is an anchor and the gate runs normally — the same scope test the existing clause uses.

Same class as the 2026-09-02 fix that added the created-this-session exclusion ("You do it every day nearly") — this is the sibling category it left open.

Verification

• make precommit green (lint, vet, govulncheck, osv-scanner, trivy, CHANGELOG structure, tests)
• Markdown-only change: commands/session-close.md + a ## Unreleased bullet

[ben-s-pull-request-reviewer]

Now I have all the information needed. Let me analyze the candidate rules and render my verdict.

Step 4c-sel CLASSIFY (diff-scoped):

Changed files: CHANGELOG.md, commands/session-close.md

Rule	Trigger matches?	Applicable?	Reason
changelog/conventional-prefix-required	CHANGELOG.md	✅ Yes	CHANGELOG.md changed
agent-cmd/command-frontmatter	commands/**/*.md	✅ Yes	commands/session-close.md changed
agent-cmd/command-thin	commands/**/*.md	❌ No	"substantially changed" — this adds 2 lines of prose to an existing rule; no new file, no structural change
agent-cmd/gap-driven-feedback	commands/**/*.md	❌ No	No agent depends on information that may be incomplete from this diff
agent-cmd/no-user-prompts	commands/**/*.md	❌ No	No permission requests or user prompts added
agent-cmd/scripts-in-claude-dir	commands/**/*.md	❌ No	No new script dependencies

Step 4d-sel ADJUDICATE:

• changelog/conventional-prefix-required: CHANGELOG bullet fix: ... — ✅ valid prefix
• agent-cmd/command-frontmatter: commands/session-close.md — frontmatter unchanged, file pre-existing

Internal consistency check on the documentation logic itself: The new paragraph (line 242) introduces a fleet-owned task exclusion that reads internally consistently with the surrounding created-this-session exclusion. No conflicts detected.

{
  "verdict": "approve",
  "summary": "Documentation-only change: a 4-line CHANGELOG entry and a 2-line addition to the session-close command doc that clarifies the fleet-owned task exclusion from the in-progress gate. The change is well-scoped, uses correct conventional prefixes, and introduces no new structural elements to the slash command.",
  "comments": [],
  "concerns_addressed": [
    {
      "concern": "correctness: documentation-only change — the fix adds a markdown exclusion rule to the session-close command doc. No Go code was modified, so the actual gate logic must already handle this case, or the fix is incomplete.",
      "disposition": "not-an-issue",
      "detail": "commands/session-close.md is itself the implementation — it is a CLAUDE.md slash command specification where the markdown IS the operational definition. The exclusion logic is fully specified in the prose (line 242) and applied via the interpret bullet at line 255 ('unless the created-this-session exclusion above applies' — fleet exclusion is documented alongside the created-this-session exclusion as an equivalent exception). The session-close command reads vault tasks via vault-cli and interprets status; the exclusion criteria (no claude_session_id naming this session, not created here, task_type present from a producer) is human-readable logic the command executes."
    }
  ]
}