test: v3 autonomous full-flow proof

[aram-devdocs]

Closes #148

Verification:

• git diff --stat shows CHANGELOG.md | 1 +.
• git diff -- CHANGELOG.md shows only the new - v3 autonomous full-flow proof bullet under ## [Unreleased].
• Confirmed the new bullet appears exactly once under Unreleased and no released changelog sections changed.

[github-actions]

I have enough context. Let me draft the review.

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Code review summary

PR: #149 — "test: v3 autonomous full-flow proof"
Author: aram-devdocs
Base: main → CHANGELOG.md only (+1 line)

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Blockers

#	Severity	File	Line	Issue	Suggestion
—	—	—	—	None	—

Warnings

#	Severity	File	Line	Issue	Suggestion
1	Warning	CHANGELOG.md	13	Changelog entry is not user-visible. AGENTS.md / CLAUDE.md: "Update the CHANGELOG under ## [Unreleased] only for user-visible changes." "v3 autonomous full-flow proof" is an internal CI/test validation artifact, not a feature or fix a user would encounter.	Remove the entry, or replace it with a user-facing description of whatever user-visible behavior was proved (e.g. a concrete feature bullet).
2	Warning	CHANGELOG.md	14	The preceding entry "v3 ACP-allowed proof" (merged via #147) carries the same problem — also not user-visible. This PR doubles down on a pattern that was already in tension with project policy.	Both bullets should be removed or rewritten before this section is released.
3	Warning	commit type	—	PR title is test: (Conventional Commits). The CHANGELOG header states this file is auto-maintained by release-please based on CC from PR #3 onward; test: commits intentionally don't produce release notes. Manually adding a changelog entry for a test: commit bypasses that intent.	If the automation should generate the note, use feat: or fix: with a meaningful description. If it's truly a test: commit, don't touch the changelog.

Architecture compliance

• [✅] No new unsafe outside plumb-cdp
• [✅] No new unwrap / expect / panic! in library crates
• [✅] No new println! / eprintln! outside plumb-cli
• [✅] No new wall-clock or HashMap in observable-output paths
• [✅] No new todo! / unimplemented! / dbg!

Anti-pattern scan

Pattern	Status	Details
Non-user-visible changelog entry	⚠️	CHANGELOG.md:13 — internal test/proof language
release-please automation bypass	⚠️	Manual edit for a test: commit type
Commented-out code / dead code	✅	None
docs/src humanizer check	✅	Not applicable (CHANGELOG.md ≠ docs/src/)

Quality assessment

The diff is one line in CHANGELOG.md. There are no Rust, safety, determinism, or layering concerns. The sole issue is policy: the project's documented rule restricts ## [Unreleased] additions to user-visible changes, and "v3 autonomous full-flow proof" describes an internal test automation exercise, not user-observable product behavior. The compound effect with the already-merged "v3 ACP-allowed proof" bullet means two consecutive entries in Unreleased are internal noise that will end up in a release note.

Scope check

• Changes match PR description: ✅ (description accurately describes the single-line diff)
• Scope creep detected: No

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Punch list

• CHANGELOG.md:13 — Remove or replace "v3 autonomous full-flow proof" with a user-facing description (or omit entirely for a test: commit).
• CHANGELOG.md:14 — "v3 ACP-allowed proof" from test: v3 ACP-allowed proof #147 has the same violation; clean up both in one pass before the next release cut so they don't land in release notes.
• Align the PR commit type (test:) with changelog practice: either use a feat:/fix: type with a real user description, or don't edit the changelog for test: commits.

Verdict: REQUEST_CHANGES