# Session 0021.0 — Transcript > App: dev-claude-plugin > Start: 2026-06-07T08-30 (PST) > End: 2026-06-07T15-58 (PST; ended on /clear) > Type: coding > Status: **FINALIZED (post-hoc reconstruction).** > ⚠️ **Reconstructed record.** This session ended on `/clear` without a completed > finalize — the `session-end-finalize-guard` hook banner-stamped it as > ended-unfinalized (see below). Its live conversation context was lost; it was > finalized later, on 2026-06-08, as a best-effort cleanup grounded in the > placeholder's own Plan section plus git history. Treat this as a reconstruction, > not a verbatim transcript. ## Launch prompt ``` /goal Ensure that implementation never happens without an implementation plan. Ensure that implementation plans are never written without a solution design that includes that slice ``` ## Plan (as captured live in the placeholder) **Goal:** Enforce the build chain in the plugin — no implementation without an implementation plan; no implementation plan without a Solution Design that includes that slice. Recursive by nature: honoring the goal while building it means design → plan → implement. Session opened as **coding** (operator choice). **Design decisions (operator-confirmed via AskUserQuestion):** 1. Enforcement strength: **soft, house-style** (verify → route → ask-when-unsure → fail open), matching the session-gate + finalize-on-goal posture. No hard blocking hook. 2. Artifacts (map to existing vocab): Solution Design = SPEC.md / spec-RFC (§3.3) — or a committed `docs/superpowers/specs/` design doc where a repo designs in-repo — that *includes the slice*; Implementation Plan = `docs/superpowers/plans/` (writing-plans output); Implementation = via superpowers:executing-plans. 3. Scope: **focused enforcement layer only** on the current three session types (keep spec/coding/discovery names); Effort B (full superpowers realignment + spec-init→plan-init rename) stays deferred. **Approach (as planned):** Document the invariant canonically in SESSION-PROTOCOL.md (docs lead automation, §4.1), then wire coding-init to gate on it (G1: plan required before implementing; G2: covering Solution Design required before a plan) and route implementation through superpowers:executing-plans. Light touch on session-gate + spec-init. Bump 0.17.0 → 0.18.0. ## What actually happened to this work (reconstructed) The session's planned standalone enforcement layer at 0.18.0 was **not shipped as planned** — it was redirected: - **v0.18.0** (PR #13, `275c633`) instead became the *superpowers verbiage rename* (the three session types → `brainstorming` / `writing-plans` / `executing-plans`) — the operator's "effort B" realignment that this session's Plan had explicitly deferred. - The build-chain invariant this `/goal` was chasing was then absorbed **structurally** by the **two-session model** (v0.22.0, PR #22): `wgl-writing-plans` folded into `wgl-brainstorming` (= reviewed spec), and `wgl-planning-and-executing` came to *own the write-the-plan step* before executing. The build chain is encoded in the session topology rather than as a separate soft-enforcement hook. So the `/goal` here is best read as a productive provocation: it surfaced the "design → plan → implement" chain that the later two-session model made load-bearing, rather than producing its own merged artifact. ## Pre-existing note (carried from the live placeholder) > Session 0020 is a dead/unfinalized placeholder whose work (the > session-end-finalize-guard hook, PR #12) already merged; flagged for cleanup, > out of scope here. (That cleanup is the same 2026-06-08 pass that finalized this transcript.) ## Cut state / outcome - No standalone merged artifact attributable to this session ID; its line of thought lives on in v0.22.0's two-session model. - Plugin source is now at v0.23.0; tree clean and pushed. ## Deferred decisions _None recoverable (context lost on /clear). The live placeholder's deferred-decisions section was empty._ ## Ended-unfinalized banner (original, from the SessionEnd guard) > ⚠️ This session ENDED WITHOUT A COMPLETED FINALIZE at 2026-06-07T15-58 (PST; reason: clear). > This placeholder holds only the last local checkpoint; the rich finalize > (narrative, memory update, PR/branch survey) did not run. The next session > should ADOPT and finalize this transcript via wgl-session-finalize, which > replaces this placeholder with the finalized record.