session 2026-06-08: ARC W3R Stage 2 (@layer middle path, !important 56→12 live) — session memory + ledger + Fowler skill-harvest + verification-ladder (delayer-diff + token-strip/render-proof cautions)

claude/memory/skill-harvest-register.md

@@ -59,6 +59,22 @@ The single place proposed skills live so they don't evaporate between sessions.
 | `/wake-up` §2.b | patch | Until upstream #1665 closes: wake searches run **unscoped + post-filter by wing** (wing-scoped `mempalace_search` errors at HEAD). Remove when the feedback memory `feedback-mempalace-wing-filter-broken` is deleted. | 2026-06-05 diagnosis | PROPOSED |
 | `/wake-up` (new step or §2 check) | patch | **Wake canary**: seconds-cheap probe at wake — every MEMORY.md pointer + `[[link]]` resolves to an existing memory file; flag dead pointers and load-bearing orphans. Lesson 7 of substrate-failure-lessons-2026-06-07 (BM false-clean sync) applied to our own index, which the harness already part-loads with a warning. | 2026-06-07 evening (memory-verdicts night) | PROPOSED |
 
+## New proposals (2026-06-08 — harvested from Fowler, *Refactoring* 2nd ed. chs 1–3, awaiting steward)
+
+*Read in the Chamber before Wave 3R. Three elements are genuinely NEW to our toolkit (not already carried by the verification ladder / Symmetria); two more are heuristics worth a feedback memory. Proposing the new ones; flagging where each would land on authorization.*
+
+| Element | Kind | One-line | Where it lands | Status |
+|---------|------|----------|----------------|--------|
+| **Revert-and-redo-smaller** | Symmetria §3 flag OR ladder note | Ch1's strongest working reflex we *don't* have: when a verification/gate fails and the cause isn't immediately visible, **revert to the last green commit and redo the step smaller** — do NOT debug forward. We default to debug-forward; this is a different reflex, and it depends on commit-after-every-green (which we already do via the byte-identical gate). | Symmetria §3 (a flag) or verification-ladder (a named discipline) | PROPOSED |
+| **Two-hat commit separation** | verification-ladder entry | Name which hat each commit wears: a *refactor* commit's compiled output is byte-identical (or carries a pre-stated classified delta); a *feature/behaviour* commit is where rendered values change. We already own the byte-identical gate + delta-classification — this names the **commit-level rule** that pairs them ("never mix a structural move and a value change in one step"). The ARC `@layer` re-partition is the textbook case. | verification-ladder (formalizes what the byte-gate implies) | PROPOSED |
+| **Bad-smells → refactoring lens** | reference card OR fold into `/code-review` | Ch3's smell catalogue (Mutable/Global Data, Duplicated Code, Shotgun Surgery, Speculative Generality, Comments-as-deodorant…) as an explicit review lens. Today it classified the `!important` census cleanly (global-data smell → `@layer`). Likely too large for a new skill; candidate to fold into `/code-review`'s prompt or a one-page reference beside the ladder. | `/code-review` prompt or new reference | PROPOSED (lowest priority — may be redundant with existing review skill) |
+
+**Heuristics (feedback-memory candidates, no skill needed):**
+- **Rule of Three** (ch2): first time do it, second wince, third refactor. Defer abstraction to the third repetition.
+- **Preparatory refactoring** (ch2, Kent Beck): *"make the change easy (warning: this may be hard), then make the easy change."* The framing for sequencing Wave 3R *before* Stage G — Jessica Kerr's "drive north to the highway." 
+
+*Note: measure-don't-speculate (ch2 date-range story) is NOT proposed — already carried by the ladder (censused-routes, measure-toolchain-before-spec). Today's census re-proved it; no new instrument needed.*
+
 ---
 
 *Discipline reminder: "no harvest" is a valid outcome; do not manufacture proposals to fill the table (the inverse of Hermes's autonomous self-write). The yardstick is the steward's: did the steward have to re-explain something a skill could have carried?*