session-history/dev-claude-plugin/0020/SESSION-0020.0-TRANSCRIPT-2026-06-06T18-46--2026-06-06T22-47.md

Session 0020.0 — Transcript

App: dev-claude-plugin Start: 2026-06-06T18-46 (PST) End: 2026-06-06T22-47 (PST) Type: coding Status: FINALIZED (post-hoc reconstruction).

⚠️ Reconstructed record. This session's live conversation context was lost (the placeholder was orphaned — its work merged but wgl-session-finalize never ran). It was finalized later, on 2026-06-08, as a best-effort cleanup grounded in git history rather than a faithful turn-by-turn capture. Treat the arc below as a reconstruction from the commits, not a verbatim transcript.

Launch prompt

Add a hook on session clear and exit to ensure that if a session was started, finalize has completed fully and no additional turns that need to be added to the transcript have happened (update the transcript and republish if so - understand that it may have already been published - still update it and push remotely).

Pre-state

• Plugin at v0.16.0 (flotilla-only-provisioning alignment, PR #10).
• Two SessionStart/Stop hooks already existed: the SessionStart session gate and the finalize-on-goal Stop hook (v0.15.0).
• Gap the prompt targets: a session that ends via /clear or exit without a completed finalize leaves its --INPROGRESS placeholder dangling and any post-publish turns unrecorded. Nothing republished or flagged that state.

Arc (reconstructed from commits)

The session designed, planned, and shipped the session-end-finalize-guard hook — the plugin's third hook — as a fire-and-forget SessionEnd safety net.

1. abf972b — design: session-end finalize-guard hook.
2. c648aae — plan: implementation (session 0020).
3. a7e82b3 — feat: add the session-end-finalize-guard SessionEnd hook.
4. 1df35f6 — feat: register it on SessionEnd.
5. d604fde — feat: flag ended-unfinalized sessions in the claim-session-id peek (so the next session sees the dangling placeholder).
6. b758f32 — docs: coding-init adopts + finalizes ended-unfinalized sessions.
7. d218f13 — docs: SESSION-PROTOCOL.md describes the SessionEnd finalize guard.
8. eee3642 — docs: list the hook in the repo hooks inventory.
9. 5b1c086 — chore: bump plugin to v0.17.0.

Design shape: deterministic-only (a SessionEnd hook can't author narrative), so when a tracked session ends without a completed finalize it republishes the latest local --INPROGRESS checkpoint and appends an "ended-unfinalized" banner so the next session adopts and finalizes it. Fails open.

Cut state / outcome

• Shipped as v0.17.0, merged via PR #12 (merge 9f37733, 2026-06-07).
• The hook is live in the plugin source and has since proven itself — it is exactly the mechanism that banner-stamped session 0021 when that session ended on /clear without finalizing.

Deferred decisions

None recorded (context lost). No low-confidence calls recoverable.

Note on this finalize

This transcript was published as part of an orphan-cleanup pass on 2026-06-08, finalizing the two dangling dev-claude-plugin placeholders (0020 and 0021) whose work had already merged. The session's actual deliverable — the finalize-guard hook — is the very thing meant to prevent this class of orphan; this placeholder predates the hook being live for its own session.