# S2_40 Final Validation Package

## Objective

Implement the S2_40 deterministic final-validation, closed-rendering, review-state, sealing, and logical-commit package specified by `stage_2_optimal_update_strategy_v.5-1.md`.

## Deliverables

- `YAML_Prompts/2. Stage_2/S2_40_SOW.md`
- `YAML_Prompts/2. Stage_2/S2_40_assets.md`
- `YAML_Prompts/2. Stage_2/Stage_2_S2_40.yml`
- Version-free S2_40 runtime, schema, workflow, renderer, validator, release, fixture, and test assets under `YAML_Prompts/2. Stage_2/Default_Agent/Stage_2_Clean/`
- Updated shared release/hash-chain assets required to admit S2_40 without introducing a legacy v0-v3 runtime dependency
- A compact Stage 2 `MEMORY.md` entry

## Scope and Non-Scope

In scope: offline-contract implementation, deterministic inline Python, closed rendering, V01-V18 validation, candidate freeze/resume, external-receipt validation, content-addressed writes, read-back verification, and status-last barrier behavior.

Out of scope: live AgentBackend/MCP admission, real Korean-lawyer sign-off, filing, external publication, production credential binding, and claims that 137-case legal coverage is complete when the physical rule/corpus approvals remain pending.

## Known Inputs

- `stage_2_optimal_update_strategy_v.5-1.md`
- `S2_00_SOW_v.2.md`, `S2_10_SOW_v.1.md`, `S2_20_SOW.md`, `S2_30_SOW.md`
- `S2_00_assets_v.2.md`, `S2_10_assets_v.1.md`, `S2_20_assets.md`, `S2_30_assets.md`
- `Stage_2_S2_00_v.2.yml`, `Stage_2_S2_10_v.1.yml`, `Stage_2_S2_20.yml`, `Stage_2_S2_30.yml`
- Current `Default_Agent/Stage_2_Clean/` release closure
- Local `SKILL.md` and `test_code_executor.ipynb`

## Material Assumptions

- Despite the prompt label `[LLM: group-parallel, immutable parts]`, S2_40 follows the controlling v5-1 contract and is a deterministic, exactly-one Code Executor task. It consumes S2_30 group-parallel immutable parts.
- Existing unrelated dirty-worktree changes remain untouched.
- Existing pending live/legal receipts stay pending unless this task produces actual external evidence, which it does not.

## Questions That Could Change the Outcome

- Whether the deployed localdocs platform supports every claimed binary-read/write and barrier behavior is a live-admission question; offline implementation must preserve it as pending rather than assume success.
- Any upstream S2_30 contract defect that prevents trustworthy S2_40 admission must be either repaired and resealed or surfaced as a blocking upstream dependency; it may not be silently accepted.

## Workstreams and Dependencies

1. Analyze controlling contracts and current package closure.
2. Draft SOW and asset inventory independently in parallel.
3. Perform exactly two independent review rounds over both documents; apply only evidenced incremental revisions.
4. Generate S2_40 assets and the authoring YAML in parallel.
5. Perform two asset-validation rounds and two YAML-validation rounds as requested, respecting available concurrency and using stable asset-family assignments.
6. Rebuild/reseal dependent manifests, bindings, receipts, and upstream hash echoes.
7. Run targeted and full regression, parity, unique-key parse, inline-code compile, release-closure, and legacy-dependency checks.
8. Update `MEMORY.md` with verified results and residual boundaries.

## Source and Tool Plan

- Use local repository sources as the controlling implementation record.
- Use `rg`/`rg --files` for discovery and existing builder/test scripts for mechanical generation and validation.
- Use `apply_patch` for authored edits; use formatting/build scripts only for mechanical projections and resealing.
- Do not use live network or external legal sources unless a newly introduced legal proposition requires verification.

## Validation Plan

- YAML unique-key parse and exact `task_procedure`/task semantics.
- Exactly one S2_40 `mcp: code-executor` / `run_code` task; no LLM fields or external Python runtime import.
- Inline Python compile, static AST guard, single-JSON stdout, localdocs user/workspace binding, and `.py`/`.txt` byte parity.
- Closed schema and path/hash/producer membership for all S2_40 inputs/outputs.
- V01-V18 fixtures, candidate freeze/resume, receipt mismatch, supersession, partial write, idempotent re-entry, barrier-last, and commit-conflict tests.
- Authoring/deployment projection parity and release/hash-chain reproducibility.
- Full S2_00-S2_40 offline regression and zero runtime references to Stage 2 v0-v3.

## Approval Boundaries

- Local file creation and non-destructive tests are authorized.
- No external write, filing, publication, production promotion, secret access, or dependency installation.

## Progress

- [x] Read governing repository rules and Stage 2 memory.
- [x] Identify the controlling S2_40 deterministic boundary.
- [x] Draft SOW and asset inventory.
- [x] Complete document review round 1.
- [x] Complete document review round 2.
- [x] Implement assets and authoring YAML.
- [x] Complete asset validation rounds 1 and 2.
- [x] Complete YAML validation rounds 1 and 2.
- [x] Reseal the package and run full validation.
- [x] Update Stage 2 memory.

## Decision Log

| Date/Stage | Decision | Basis | Consequence |
|---|---|---|---|
| 2026-09-01 / intake | Treat S2_40 as deterministic rather than LLM-direct | v5-1 §§0, 2, 9, 16 and the five-task execution constitution | GPT-5.6 settings do not appear in the S2_40 task; S2_30 remains the group-parallel LLM owner |
| 2026-09-01 / trust boundary | Preserve live and legal admission as pending | No live Code Executor, external receipt, corpus approval, or lawyer sign-off is authorized or available | Offline verification cannot be reported as production readiness |
| 2026-09-01 / final YAML audit | Apply the second YAML audit without opening a third review loop | The requested two YAML review/revision loops are complete; remaining work is implementation correction and deterministic verification | Finish full S2_00/S2_10 hydration, zero/N review requests, RESUME digest recomputation, generated-output schema checks, and strict production gates locally |

## Evidence Ledger

| Claim/Issue | Source or Test | Status | Notes |
|---|---|---|---|
| S2_40 is deterministic | v5-1 §§0, 2, 9, 16, 20 | VERIFIED | Exactly one release-bound inline Python task |
| S2_40 is the final single writer | v5-1 §§3.4, 9.4 | VERIFIED | Owns final ledger, documents, status, seal, and commit receipts |
| S2_40 barrier is `control/run_status.json` | v5-1 §§0.5, 3.3, 9.5 | VERIFIED | Must be written last after content read-back |
| Live/legal readiness | Current manifests/receipts and later tests | PENDING | Must remain evidence-separated |

## Risks and Failure Modes

- Mixing S2_30 LLM fan-out semantics into S2_40.
- Treating an untrusted upstream part, external receipt, or workspace-local manifest as its own trust anchor.
- Hash cycles among parent release, module manifest, bindings, admission receipts, candidate package, and operational commit receipts.
- Partial writes becoming consumable before the final status barrier.
- Renderer accepting arbitrary free text in structured relief sections.
- Review-required legal uncertainty being converted into global no-save.
- Existing user changes being overwritten or staged accidentally.

## Results and Residual Uncertainty

- Final authoring artifacts: `S2_40_SOW.md` 879 lines / SHA-256 `6930cd6438ae29187d01c7bf463cf308d34e90c73d4e755b5573ab92090f4a04`, `S2_40_assets.md` 528 lines / `ed518213100971fde44aca385890761d8b7b2f86ad2c18a29b5f960d46ec8787`, and `Stage_2_S2_40.yml` 3,575 lines / `5cbe2ac9aa73d95a5fa4e6cf71d7d8f0ad83aa05536f573c13e42505ef5d46f7`.
- The rebuilt module manifest contains 222 modules. Raw parent release SHA-256 is `9fa85bb94c5f14f675dcdaa0cf94d06745b21675d97797539ffc14015dcc9f53`; S2_10 and S2_30 child raw hashes are `cb49a4501116e46d935933b739b6679b11d961ff8e36abefea35dab6b25508fb` and `e6dd6abe44b39de462ea01f5e78aa39c70bbf47e0b75e08d224615a297d2135f`.
- Eight no-write projection/child/shared checks and an independent temporary-output module/parent reproducibility build passed. The release validator returned `PASS`, zero errors, and four expected pending findings.
- Offline regression passed 240/240: S2_00 70, S2_10 42, S2_20 42, S2_30 37, and S2_40 49. Python/documentation mirrors passed 62/62 and S2_00/S2_20/S2_30/S2_40 authoring/deployment projection parity passed 4/4.
- Runtime/deployment/release dependency on legacy Stage 2 v0-v3 is zero. A v.3 path remains only inside a negative fixture that proves such an injected dependency is rejected.
- Final state is `IMPLEMENTED_OFFLINE_VERIFIED / LIVE_AND_LEGAL_ADMISSION_PENDING`. The four pending validator findings are full-137 approved relief-rule coverage, parent production admission, signed deterministic backend admission, and live S2_40 secret/Code Executor binding. No live execution, legal sign-off, filing, or production promotion was performed.