Loomworks — Phase 57 Step 2b live halt — session handoff

Version. 0.1 Date. 2026-05-12 Author. Marvin Percival (DUNIN7), prepared via Claude.ai (the CR-drafting + Step-2b-live-capture chat). Status. Standalone orientation artifact for the fresh scoping chat that follows. Purpose. Hand the next chat enough state to begin scoping the Option X / Y / Z decision per phase-57-halt-surface-2026-05-12-step-2b-live-v0_1.md §6 without re-reading the entire build session.

1. What this document is

A bridge from the just-closed build session (CR drafting + Step 2b live capture) to a fresh scoping chat. The build session ended when the live conversation at /operator/create-engagement surfaced Sub-arc 5f as a false positive — the third halt-and-surface event within Phase 57.

This handoff does not scope amendment cycle 3. That belongs in the fresh chat, per the substrate-friction-discipline-pattern's note-first → fresh-chat-scoping → Operator-elective-amendment cadence. This handoff orients; the scoping chat decides.

The authoritative artifact for the halt itself is the halt-surface note at engine repo docs/phase-impl-notes/phase-57-halt-surface-2026-05-12-step-2b-live-v0_1.md (filed at engine commit 5534068; amended at 771aacd with verbatim §2 transcript + §2.1 response-shape observations). This handoff points to it; it does not replace it.

2. Where Phase 57 is right now

Branch state at halt

• Engine DUNIN7/loomworks-engine — branch phase-57-marketing-engagement-creation at HEAD 771aacd. Five docs-only commits since the cycle-2 baseline 38d0008 (every commit since cycle-2 baseline is docs-only; engine source byte-identical to cycle-2 baseline). Working tree clean.
• Operator Layer DUNIN7/loomworks — branch phase-57-marketing-engagement-creation at HEAD e56ede0. Two OL commits across cycle 2 (04de7f7 Sub-arc 5c ChatView runtime-binding fix; e56ede0 Sub-arc 5e +1 vitest pinning POST body shape). Working tree clean.
• Marketing site — untouched.

Test counts at halt

• OL vitest: 151 / 151 pass (+1 net per P57-B7 floor exact).
• Engine pytest: 2,279 pass + 1 fail + 32 skip — the one failure is tests/test_api_assertion_retract.py::test_api_assertion_retract, a pre-existing dependency-drift issue (starlette 1.0 / fastapi 0.135.3 vs app.py:461 validation-error handler) filed as halt-surface §10 finding 7.2 and accepted out-of-scope at Sub-arc 5f.
• Alembic head: 0064 unchanged across all of cycle 1 + cycle 2.
• Prerendered OL routes: 11 unchanged.

Phase 57 work landed and held

• Sub-arc 1 (engine substrate Step 1): Field 6 per-field elicitation prompt component at prompts/intent_instructions/create_engagement/additional_assertions.md. Landed pre-cycle-1-halt at engine a00f4a3. Correct and untouched.
• Sub-arc 4 (cycle 1; OL signin alignment): IdentifierStep.tsx empty-email guard removed; signin-flow.ts POST body conditioned on email presence; field surface text plain-terms-disciplined; new vitest at OL count 150. Landed at OL e435b30. Correct and untouched.
• Sub-arc 5a + 5b (cycle 2; diagnostic phase + findings document): CRV-B1 through CRV-B6 ran live; findings document at docs/phase-impl-notes/phase-57-step-2c-diagnostic-findings-v0_1.md identifies root layer (OL ChatView.tsx) and fix sites. §10 secondary findings carry deferred-to-Phase-58 items (CRV-B3 sub-finding 3b field_coverage producer gap; dependency-drift finding 7.2).
• Sub-arc 5c (cycle 2; OL runtime-binding fix): ChatView.tsx handleSend adds intent_hint: "create_engagement_entry" to POST body when mode === "create-engagement" AND no prior creation-mode companion turn; history-fetch skipped when mode === "create-engagement" AND no projectId. Landed at OL 04de7f7.
• Sub-arc 5e (cycle 2; +1 OL vitest): pins the POST body wire path under both intent_hint conditions. Landed at OL e56ede0. OL vitest 150 → 151.
• Sub-arc 5f (cycle 2; lightweight post-fix confirmation): PASSED at the wire-path level; FAILED at live-usage level. This is the halt. See halt-surface note §1 and §2.

Phase 57 work not yet attempted

• Step 2b live conversation (incomplete — surfaced the halt; transcript captured in halt-surface §2).
• Step 3 (calibration capture from real-Operator transcript).
• Step 4 (implementation notes + observation capture).
• Step 5 (close protocol + tag).
• Reserved buffer slots: both consumed (Step 6 cycle 1; Step 7 cycle 2). A third amendment cycle would expand reserved budget and itself trip §11 — explicit Operator authorization is the gating event.

3. How we got here — trajectory worth preserving

Phase 57 has now exercised the substrate-friction-discipline-pattern four times within itself (three halts + the original Phase 49 instance gives four instances of the pattern's build-mode firing across the methodology's history). The trajectory:

1. Pre-build. Phase 57 scoping settled v0.2 with ten P57-D items. Step 0 ran cleanly; Step 1 landed Field 6 prompt; Phase 57 entered Step 2 expecting a clean live conversation.
2. Cycle-1 halt (2026-05-12 morning). Sub-arc 4 surfaced: OL signin guard blocked the WebAuthn discoverable-credential path; standing email-not-identity principle not named in source-of-truth documents. Halt-surface note → cycle-1 scoping note (ten P57-A items) → CR v0.2 → Sub-arc 4 fix → Step 2a complete, OL at e435b30.
3. Cycle-2 halt (2026-05-12 afternoon). Live conversation at /operator/create-engagement returned general_conversation shape on diagnostic exchange ("Tell me what the capital of NZ is" → "Wellington"). Halt-surface note → cycle-2 scoping note (ten P57-B items) → CR v0.3 → Sub-arcs 5a–5e (diagnostic-first execution posture per Candidate F).
4. Cycle-2 close attempt. Sub-arc 5f lightweight confirmation passed at the wire-path level — engine receiving real OL POST bodies with intent_hint. CC handed off to Operator Step 2b.
5. Cycle-3 halt (2026-05-12 evening; this one). Step 2b live conversation reproduced the cycle-2 halt-surface §2.1 reading exactly — Companion opening turn was the general-purpose opener, not Field 1 of the marketing-creation prompt; time queries returned general_conversation refusals; capital-of-NZ → "Wellington" reproduced verbatim; "I parked on Level 13" → "I'll remember that" surfaced quick-capture-engagement behavior (positive evidence for Phase 58+ but wrong engagement class for Phase 57's target).

Position throughout: this is a phase about ship-the-marketing-engagement-creation surface. Engineering shipped; classification/template-selection does not.

The trajectory worth preserving for v0.42 manifest absorption: the pattern fired four times in one phase, each time the diagnostic envelope expanded by one layer. Cycle 1 found surface drift (Sub-arc 4); cycle 2 found wire-binding drift (Sub-arcs 5a–5e); cycle 3 reveals that even with wire-binding corrected, the engine layer downstream of wire-binding does not engage creation-flow scaffolding.

4. The halt-surface note

Path. docs/phase-impl-notes/phase-57-halt-surface-2026-05-12-step-2b-live-v0_1.md on engine repo branch phase-57-marketing-engagement-creation.

Commit history of the note.

• 5534068 — original structure + §1, §3–§9.
• 771aacd — §2 verbatim transcript + §2.1 response-shape observations.

Sections.

• §1. What happened — Sub-arc 5f false-positive surfaced at Step 2b live.
• §2. Verbatim transcript (twelve turns; Companion opener at 9:40 PM through "Got it, I'll remember that" at 7:54 PM; token counts [4,532 in · 80 out · 4,612 total] and [4,542 in · 71 out · 4,613 total] preserved as displayed).
• §2.1. Five response-shape observations. Notable signal: bullet 5 establishes that the engine IS receiving real OL POST bodies (the token counts on Companion turns prove the wire path is reaching the engine). This narrows §3's candidate space.
• §3. Three candidate root layers:
• Candidate A — stale OL bundle (HMR didn't pick up, dev server serving stale chunks). Partially weakened by §2.1 bullet 5 (engine IS getting requests); but whether requests carry intent_hint is still open per the wire-direction probe sequence.
• Candidate B — engine intent_hint not honored. The Q1 verdict at Sub-arc 5b confirmed mechanism (i) or (ii) for create_engagement_entry; this halt invalidates that verdict or surfaces a subtler engine-side behavior.
• Candidate C — template-selection layer downstream of classification. Classification engages correctly; template-selection rejects the creation-flow template and falls back to general_conversation rendering. This would be a fourth root layer the CRV-Bs did not enumerate, which is itself a halt-class trigger per CR §11 ("a fourth root layer the cycle-2 halt-surface §4 diagnostics didn't anticipate").
• §4. Architectural reframing — substrate-engagement is a four-layer chain: present → classified → template-selected → response-shaped. Cycle 2 audited layers 1–2. Live failure surfaces at layer 3 or 4. The cycle-2 framing (substrate-presence-vs-substrate-engagement) was correct about the existence of an engagement boundary but wrong about its location.
• §5. Methodology candidate G — single-instance evidence at this halt: post-fix-confirmation-can-pass-while-live-usage-fails-when-confirmation-scope-is-narrower-than-usage-surface. Lightweight confirmation at Sub-arc 5f checked the wire path; live usage exercises the full request → classify → template-select → render path. The two are not equivalent. v0.21 framing candidate.
• §6. Three Operator-elective paths (Option X / Y / Z — see §5 below).
• §7–§9. Branch state at halt, carry-forward index for the next scoping chat, next actions.

5. The Option X / Y / Z decision space

Per halt-surface note §6, the next scoping chat settles which of these to pursue. This handoff paraphrases the option space; the scoping chat consumes the halt-surface note's full §6 prose.

Option X — Amendment cycle 3

Authorize a third amendment cycle. Reserved budget is exhausted, so this is an explicit expansion of reserved budget that itself trips §11. The scoping chat would produce a cycle-3 scoping note (ten or fewer P57-C items per the cycle-1 / cycle-2 precedent shape), which would feed CR v0.4 drafting in a subsequent chat. Sub-arc 6 would audit layer 3 (template-selection) and possibly layer 4 (response-shaping) per the §4 architectural reframing. Diagnostic-first execution posture per Candidate F still applies — the new envelope is layers 3 + 4, not a pre-specified fix.

Cost: expands Phase 57 beyond design budget; the reserved-not-skipped principle's "calibrated to actual mid-build amendment frequency at the worst case observed" framing from CR v0.3 §10 Step 7 is invalidated by this option (worst case observed is now three cycles, not two).

Benefit: closes Phase 57 with the deliverable actually working; preserves the marketing-engagement-creation surface as a real artifact.

Option Y — Close Phase 57 with known defect

Ship what landed. Field 6 prompt (Sub-arc 1) is correct. Sub-arc 4 OL signin alignment is correct. Sub-arc 5 wire-binding fix is correct as far as it goes. The marketing engagement does not yet get created via the conversational creation surface on /operator/create-engagement; that requires Phase 58 work. Phase 57 closes with the wire path corrected and the live-usage gap explicit in implementation notes.

Cost: Phase 57's product deliverable (marketing engagement exists as a real engagement; first real-Operator transcript captured) does not land. The methodology deliverable (real-Operator calibration fixture) does not land — there is no real-Operator-using-the-creation-flow transcript yet, because the creation flow doesn't engage.

Benefit: Phase 57 closes; Phase 58 absorbs the remaining work; reserved-budget discipline is preserved (slots were calibrated for two cycles; phase that needs three closes at two and defers the third).

Option Z — Halt-stay

Leave the build branch open without closing or amending. Not preferred. Environmental drift accumulates over time (the dependency-drift finding 7.2 is already an instance — starlette/fastapi versions moved between cycle-1 close and cycle-2 halt without anyone noticing); inter-session intervals make the drift worse.

Cost: indefinite drift accumulation; build state becomes harder to resume.

Benefit: none structural; only deferral of the decision.

What the scoping chat needs to decide

Not which option is best in the abstract — which option is best given the trajectory. The scoping chat reads:

• The halt-surface note in full.
• Methodology candidate G alongside Candidate C's now-four-instance evidence.
• The queued-directions list (the OL audit candidates were already in plan for Phase 58 before cycle 3 happened; cycle 3's evidence sharpens their shape).
• The substrate-friction-discipline-pattern's resolution shape (note-first → fresh-chat scoping → Operator-elective amendment), now exercising a third firing within a single phase for the first time.

The decision is architectural (which option's shape best preserves methodology integrity) rather than tactical (which option gets the marketing engagement created soonest).

6. Reading order for the scoping chat

Load in this order:

1. This handoff (orientation).
2. phase-57-halt-surface-2026-05-12-step-2b-live-v0_1.md at engine HEAD 771aacd (authoritative for the halt; §6 is the option space the chat settles).
3. phase-57-step-2c-diagnostic-findings-v0_1.md at engine HEAD (current state) — the Sub-arc 5b findings document; §10 secondary findings 7.1 (CRV-B3 3b) + 7.2 (dependency drift) are deferred items.
4. phase-57-halt-surface-2026-05-12-step-2b-v0_1.md (cycle-2 halt-surface; structural precedent and §4 CRV-Bs context).
5. phase-57-halt-surface-2026-05-12-v0_1.md (cycle-1 halt-surface; structural precedent and the surface-vs-contract framing).
6. phase-57-cr-marketing-engagement-creation-v0_3.md (CR v0.3; §3.B P57-Bx items, §10 Step 2c, §11 halt conditions — establishes what was authorized at cycle 2).
7. loomworks-phase-57-cr-amendment-2-scoping-note-v0_1.md (cycle-2 scoping note; structural precedent for cycle-3 scoping note shape if Option X is chosen).
8. loomworks-phase-57-cr-amendment-scoping-note-v0_1.md (cycle-1 scoping note; structural precedent).
9. current-status-manifest-v0_41.md (substrate baseline; named principles, especially §2 substrate-friction-discipline-pattern, reserved-slot-as-halt-condition-pre-commitment).
10. loomworks-queued-directions-and-deferred-work-v0_11.md (queued directions context; the OL surface-vs-contract audit and OL route-to-substrate runtime-binding audit candidates were already in plan for Phase 58; cycle 3's evidence informs their consolidation).

Optional precedent: phase-49-cr-amendment-v0_2-v0_1.md for multi-cycle CR archival shape if Option X carries to CR v0.4 drafting.

7. Methodology state at halt

Methodology candidates at cycle-3 halt: fourteen (was thirteen at cycle-2 close projection per P57-B9; +1 from Candidate G at this halt).

The thirteen carried into cycle 3:

1. First usage-event phase pattern.
2. Real-Operator-evidence-and-persona-projection-contrast pattern.
3. Surface-as-product event pattern.
4. Pre-drafted-content posture vs blank-page Operator posture.
5. Post-tag-docs-on-main pattern.
6. Silent Option-A application (Step 0 branch lifecycle refinement).
7. Candidate A — engine-correct-surface-drifted (cycle 1).
8. Candidate B — standing-principle-not-named-in-source-of-truth-documents-allows-contradicting-surface-to-ship (cycle 1).
9. Candidate C — substrate-friction-discipline-pattern-build-mode-firing (now four-instance evidence: Phase 49 Step 4 + Phase 57 cycle 1 + cycle 2 + cycle 3; clears v0.21 promotion threshold with strong margin).
10. Candidate 10 — cr-amendment-drafting-prose-overclaim-when-handoff-says-unchanged (cycle 1; sharpened during cycle-2 Step 2b — the unchanged-since-N overclaim fires not just at CR drafting but at handoff drafting).
11. Candidate D — per-route-companion-routing-not-asserted-at-step-0 (cycle 2 halt-surface; remediation-half candidate paired with Candidate F).
12. Candidate E — positive-observation candidate (cycle 2 halt-surface; banner string "Setting up a new project" confirmed correct on live surface — first plain-terms-discipline-holds positive evidence).
13. Candidate F — diagnosis-as-architecture-when-runtime-binding-fails (cycle 2 scoping; build-discipline-half candidate paired with Candidate D).

The new one at cycle-3 halt:

1. Candidate G — post-fix-confirmation-can-pass-while-live-usage-fails-when-confirmation-scope-is-narrower-than-usage-surface. Single-instance evidence at this halt. Generalization: lightweight post-fix confirmations need to exercise the full live-usage surface, not just the layer the fix touched. Sub-arc 5f's confirmation checked the wire path; live usage exercises classify → template-select → render. The two are not equivalent. v0.21 framing as a sharpening of substrate-friction-discipline-pattern's resolution shape: the pattern's "Sub-arc Xf lightweight confirmation" step is itself a candidate for tightening — confirmation scope should match usage scope.

Candidate C's four-instance evidence within a single phase is structurally novel — prior instances of the pattern fired once per phase. v0.21 consolidation may want to distinguish cross-phase pattern firing (Phase 49 + cycle 1) from within-phase pattern recurrence (cycles 1 + 2 + 3 within Phase 57). The within-phase pattern is what reserved-slot pre-commitment is designed to absorb; consuming both slots and surfacing a third halt is the threshold case for the design.

8. Local stack state and inter-session hygiene

CC left the local stack running:

• Engine API pid 90683 on :8000.
• OL dev server pid 49049 on :3001.
• /operator/create-engagement route loads cleanly; Sub-arc 5 fix landed; banner present; scrollback empty (Sub-arc 5c history-fetch skip working).

Leaving running keeps the live surface available for §3 candidate probes during the scoping chat (the scoping chat may want to inspect the live surface to sharpen between Candidates A / B / C). Your call whether to shut down before the inter-session interval. If inter-session interval is expected to be long (overnight, multi-day), shutting down is cleaner; if scoping chat opens within an hour, leaving running saves the setup cost.

Inter-session hygiene reminder: the dependency-drift finding 7.2 was masked at cycle-1 close under an older library version and surfaced at cycle-2 Sub-arc 5f. Any inter-session interval risks similar drift. The scoping chat should re-baseline test counts at its open (run .venv/bin/pytest -q engine + npm test -- --run OL) and note any divergence from this handoff's recorded baseline.

9. What the scoping chat does next

The scoping chat's job is to settle the Option X / Y / Z decision and produce a scoping note. It does not draft CR v0.4 (if Option X is chosen) — that goes to yet another fresh chat after scoping closes.

Scoping chat workflow:

1. Read the items in §6 above in order.
2. Re-baseline test counts at chat open (note divergence from this handoff's recorded 2,279 + 1 fail + 32 skip engine / 151 OL).
3. Settle Option X / Y / Z.
4. If Option X: produce loomworks-phase-57-cr-amendment-3-scoping-note-v0_1.md with the P57-Cx items (anticipated: ~5–10 items covering Sub-arc 6 envelope, diagnostic-first posture for layers 3 + 4, reserved-budget-expansion explicit authorization, test surface floor/ceiling, gate updates, methodology candidate carry-forward).
5. If Option Y: produce loomworks-phase-57-close-with-known-defect-scoping-note-v0_1.md (or similar) — settles what closes, what defers to Phase 58, how the implementation notes record the gap, how the queued-directions list absorbs.
6. If Option Z: produce a halt-stay note + a re-scoping calendar trigger.
7. Hand off to the next chat (CR drafting for Option X; Phase 57 close handoff for Option Y; calendar trigger for Option Z).

10. What this chat (the build session) deliberately did not do

For trajectory preservation per the discovery-record posture:

• Did not scope amendment cycle 3. The substrate-friction-discipline-pattern requires fresh-chat scoping. Collapsing scoping into the build session would erode the methodology by exactly the pattern its discipline is designed to prevent.
• Did not attempt a fix. CC halted on the false-positive surfacing; no production change since Sub-arc 5e at OL e56ede0. The build branch state preserves the cycle-2 work intact.
• Did not pre-decide the cycle-3 fix layer. Candidates A / B / C remain open; §2.1 bullet 5 narrows the space but does not settle it. The scoping chat may want a Sub-arc 6a diagnostic phase (per Candidate F precedent at cycle 2) before settling fix shape.
• Did not recommend Option X / Y / Z. The architectural-vs-tactical framing in §5 above is the closest I came; the scoping chat's job is to weigh the trade-offs against the methodology's longer arc, which is the Operator's call.
• Did not produce CR v0.4. Premature; depends on Option X being chosen and on the scoping note settling.
• Did not update queued-directions-and-deferred-work-v0_12.md. Premature; depends on the scoping chat's settlement of which items absorb into cycle 3 vs Phase 58.

11. Kickoff prompt for the scoping chat

Paste-ready:

Open Phase 57 cycle-3 amendment scoping per
phase-57-halt-surface-2026-05-12-step-2b-live-v0_1.md
(engine repo docs/phase-impl-notes/; commits 5534068 + 771aacd
on branch phase-57-marketing-engagement-creation).

Read in this order:
1. loomworks-phase-57-step-2b-live-halt-session-handoff-v0_1.md
   (this is the orientation artifact; carries §6 reading-order
   inheritance, §7 methodology state, §8 local stack state)
2. phase-57-halt-surface-2026-05-12-step-2b-live-v0_1.md
   (authoritative for the halt; §2 verbatim transcript + §2.1
   response-shape observations; §3 three candidate root layers;
   §4 four-layer architectural reframing; §5 Candidate G;
   §6 Option X / Y / Z space)
3. phase-57-step-2c-diagnostic-findings-v0_1.md (Sub-arc 5b
   findings + §10 secondary findings deferred items)
4. phase-57-halt-surface-2026-05-12-step-2b-v0_1.md (cycle 2)
5. phase-57-halt-surface-2026-05-12-v0_1.md (cycle 1)
6. phase-57-cr-marketing-engagement-creation-v0_3.md (CR v0.3 —
   establishes what was authorized at cycle 2)
7. loomworks-phase-57-cr-amendment-2-scoping-note-v0_1.md
8. loomworks-phase-57-cr-amendment-scoping-note-v0_1.md
9. current-status-manifest-v0_41.md
10. loomworks-queued-directions-and-deferred-work-v0_11.md

At chat open, re-baseline test counts:
- Engine: cd /Users/dunin7/loomworks-engine && .venv/bin/pytest -q
  Expected per handoff: 2,279 pass + 1 fail + 32 skip
- OL: cd /Users/dunin7/loomworks && npm test -- --run
  Expected per handoff: 151 vitest pass
Note any divergence; dependency drift between sessions is a known
risk (see handoff §8; halt-surface §10 finding 7.2 is one instance).

The scoping chat's job:
- Settle Option X (amendment cycle 3, expand reserved budget) vs
  Option Y (close Phase 57 with known defect; absorb into Phase 58)
  vs Option Z (halt-stay, not preferred).
- Produce the corresponding scoping note (cycle-3 scoping note if X;
  close-with-known-defect scoping note if Y; halt-stay note + calendar
  trigger if Z).
- Decide whether the cycle-3 scoping note (if X) settles fix shape
  or defers to a Sub-arc 6a diagnostic phase per Candidate F precedent.
- Decide whether queued-directions-and-deferred-work-v0_12.md
  (next bump) absorbs cycle-3 deferrals or whether cycle 3 absorbs
  them.

The scoping chat does NOT draft CR v0.4. That's a separate fresh
chat after scoping closes (if Option X is chosen).

The scoping chat does NOT decide whether cycle 3 is authorized —
that's the Operator's call, surfaced explicitly per P57-B10
reserved-budget-expansion-requires-explicit-authorization. The
scoping chat surfaces the trade-offs; the Operator decides.

Local stack at scoping-chat open:
- Engine API pid 90683 on :8000 (may still be running per handoff §8;
  re-check; restart if down).
- OL dev server pid 49049 on :3001 (may still be running per handoff §8;
  re-check; restart if down).
- /operator/create-engagement loads with Sub-arc 5 fix; live surface
  available for §3 candidate probing during scoping.

Build branch state at scoping-chat open:
- Engine HEAD 771aacd (halt-surface §2 amendment).
- OL HEAD e56ede0 (Sub-arc 5e).
- No mid-build commits to revert; cycle-2 work is correct and stays.

Begin by reading this handoff in full, then the halt-surface note.
Then ask the Operator which option (X / Y / Z) is the working frame
for the scoping session — or surface a recommendation with explicit
trade-offs if uncertain.

12. Footer

This handoff closes the build session that drafted CR v0.3, captured Step 2b live, and surfaced the cycle-3 halt. The build session does not resume from here; the scoping chat that consumes this handoff is the next active session.

If anything in this handoff is contradicted by inspection at scoping-chat open (re-baselining surfaces test-count divergence; halt-surface note has been amended further by CC between sessions; local stack state has changed), the live evidence supersedes this handoff's recorded state. This handoff is correct as of its writing time but not re-verified across the inter-session interval — methodology candidate 10's sharpening at cycle 2 applies to this document equally.

DUNIN7 — Done In Seven LLC — Miami, Florida Loomworks — Phase 57 Step 2b live halt — session handoff — v0.1 — 2026-05-12