diff --git a/dev-claude-plugin/0020/SESSION-0020.0-TRANSCRIPT-2026-06-06T18-46--2026-06-06T22-47.md b/dev-claude-plugin/0020/SESSION-0020.0-TRANSCRIPT-2026-06-06T18-46--2026-06-06T22-47.md
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+# 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.
diff --git a/dev-claude-plugin/0020/SESSION-0020.0-TRANSCRIPT-2026-06-06T18-46--INPROGRESS.md b/dev-claude-plugin/0020/SESSION-0020.0-TRANSCRIPT-2026-06-06T18-46--INPROGRESS.md
deleted file mode 100644
index 0c2c630..0000000
--- a/dev-claude-plugin/0020/SESSION-0020.0-TRANSCRIPT-2026-06-06T18-46--INPROGRESS.md
+++ /dev/null
@@ -1,23 +0,0 @@
-# Session 0020.0 — Transcript
-
-> App: dev-claude-plugin
-> Start: 2026-06-06T18-46 (PST)
-> Type: coding
-> Status: **PLACEHOLDER — claimed at session start; finalized at session end.**
->
-> This file reserves session ID 0020 for dev-claude-plugin. The driver replaces this
-> body with the full transcript and renames the file to its final
-> SESSION-0020.0-TRANSCRIPT-2026-06-06T18-46--<end>.md form at session end.
-
-## 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).
-
-```
-
-## Deferred decisions
-
-_Autonomous-mode low-confidence calls the driver made and would have
-liked operator input on. Appended as the session runs; surfaced at
-finalize. Empty if none._