S177 — Design PATCH2 Summary

Date: 2026-05-19 Outcome: PASS — PATCH2 design authored, uploaded to KB, closes every R0 drift and folds every closed OQ. Authored by: Claude Code (Opus 4.7) Pairs with:

• knowledge/dev/lark/s177-controlled-crud-gateway/s177-architecture-design-2026-05-19-patch2.md (full design)
• knowledge/dev/lark/s177-controlled-crud-gateway/README.md (folder index, created in this round)
• knowledge/dev/lark/s177-controlled-crud-gateway/s177-r0-code-reconcile-report-2026-05-19.md (R0 input)
• knowledge/dev/lark/s177-controlled-crud-gateway/s177-oq-decision-record-2026-05-19.md (OQ input)
• knowledge/dev/lark/s177-controlled-crud-gateway/s177-architecture-design-2026-05-19-patch1.md (PATCH1, superseded)
• knowledge/dev/lark/s177-controlled-crud-gateway-requirements-v2.md (đề bài v2.2)

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1. Verdict

PASS. PATCH2 is design-complete and ready for GPT/User review. All eleven required design areas (P2-1 through P2-11) are addressed. All five material drifts and both partial drifts identified by S177-R0 are resolved at the design level. All five closed OQ decisions (OQ-2/-3/-4/-5/-7) are folded into the design as binding decisions. README/index for the S177 folder has been created.

No code was written. No source was mutated. No commit was made. No Lark write happened. Nothing was deployed. The agent did not self-advance to Sprint 1.

2. Sections changed vs PATCH1

Section	What changed
A (exec summary + risks + sprint plan)	Sprint 0 marked CLOSED; risk register updated with R-10 (drift resolved) and R-11 (live-test quarantine); architecture diagram updated to show LarkCore.write(...) as the only external write entrypoint
B.3 (error handling)	Replaced with §P2-2 routing table mapping every Sprint-1 exception into the real 0–5 exit-code enum; explicit "no enum extension in Sprint 1" decision
B.4 (rate / batch)	Unchanged; augmented by §P2-10 write_endpoint_options: block in lark-api-limits.yaml
C.2 (per-layer behaviour)	Layer 7 PII reaffirmed (OQ-3 split); layer 8 now binds to LarkCore.write(...), not a hypothetical write API
C.6 (audit + orphan)	Inline "delete-if-safe" path removed; orphan = always retain + log; emergency sink on independent fd
D.3 (PII policy)	OQ-3 folded — --pii-strict deferred (not Sprint 1)
E (GPG backup)	OQ-2 folded — VPS public-key only, private key offline, no on-VPS decrypt Sprint 1
F.1 / F.3 (MCP topology)	OQ-4 folded — plugin read-only-if-hideable else full replace; all writes via service + SafetyLayer; host capability check is Sprint 2 acceptance
G.3 (CLI)	Click → argparse. Records/fields subparser groups registered into existing cli.lark_tool subparsers via register(subparsers); per-command cmd_* handlers; --no-dry-run / --confirm as store_true flags
G.5 (LarkCore integration)	Net-new LarkCore.write(method, endpoint, *, json_data, params, timeout, idempotency_key, client_token_supported, _audit_cmd); _request stays private; client_token attached automatically per endpoint; six Sprint-1 record-class endpoints enumerated
H.2 / H.3 (testing)	Net-new tests/conftest.py, LARK_TEST_INTEGRATION=1 env gate, assert_buffer_base_token(...) hard assert; existing ungated live tests quarantined in Sprint-1 prereq step
I (sprint breakdown)	Sprint 0 closed; Sprint 1 acceptance updated to include conftest.py, exception subclasses, LarkCore.write, AuditLogger extension, endpoint whitelist additions, lark-api-limits.yaml write_endpoint_options
J (open questions)	OQ-1 closed by R0; OQ-2/-3/-4/-5/-7 closed by folding; OQ-6 remains environment-only; OQ-8 (per-endpoint client_token support) and OQ-9 (allowed_endpoints.yaml exact shape) added as Sprint-0.5 micro-tasks

3. R0 drift resolution map

R0 #	Drift	Severity	PATCH2 resolution
1	CLI = argparse (not Click)	MATERIAL	§P2-1: argparse register(subparsers) + cmd_* dispatch; entry point stays cli.lark_tool:main; no Click, no fork, no new binary
2	Exit codes — real enum 0–5 (not invented)	MATERIAL	§P2-2: full routing table; EXIT_CRED_LOST=5 reserved for credential loss only; partial-failure → EXIT_INTERNAL=3 + WriteOutcome.status="partial_failure"; no enum extension in Sprint 1
3	Exception names / parents (LarkClientError, LarkAPIError)	partial	§P2-8: all net-new exceptions subclass LarkClientError; LarkAPIError uses correct caps; net-new set = ApprovalError, SafetyViolation, PartialFailureError, AuditWriteError, UnknownBaseError
4	LarkCore — no public write, _request private, no idempotency_key/client_token	MATERIAL	§P2-4: net-new LarkCore.write(...); _request stays private; client_token attached automatically per endpoint; six Sprint-1 endpoints enumerated; lint test forbids _request calls outside core
5	AuditLogger — only post-hoc log_call; no 2-phase, no emergency, no orphan	MATERIAL	§P2-3: four net-new methods (log_write_planned, log_write_result, log_write_emergency, log_orphan_backup); JSON schemas for each; ordering invariants; emergency sink on independent fd; _write mask-skip list extended for idempotency_key/backup_ref/request_id/operation_id etc.
6	Rate limiter — match	MATCH	No change
7	Registry → KeyError (not UnknownBaseError)	partial	§P2-8: service layer wraps KeyError → UnknownBaseError(LarkClientError); Registry itself untouched
8	Base đệm token confirmed	MATCH	Reaffirmed in §P2-5 as the integration hard-assert
9	Test harness — ungated live tests, no conftest.py, no env gate convention	MATERIAL	§P2-5: net-new conftest.py, LARK_TEST_INTEGRATION=1, assert_buffer_base_token; §P2-11 quarantines existing ungated tests in Sprint 1 prereq step
10	import requests only in core — match	MATCH	Reaffirmed by lint rule in §P2-4
11	config/ dir conventions — match	MATCH	New lark-api-limits.yaml (with optional write_endpoint_options:), write-approvals.yaml, pii-fields.yaml all land in config/

All 5 material drifts resolved at design level. Both partial drifts resolved at design level. No new drift discovered during PATCH2 authoring.

4. OQ decision fold-in map

OQ	Decision	Where folded in PATCH2
OQ-2	VPS public-key only; private key offline; no on-VPS decrypt Sprint 1	§P2-7 (OQ-2 sub-section); §E unchanged but now bound
OQ-3	Guarded writes proceed on PII (metadata-only); plaintext/export/stdout/non-GPG blocked; audit/rollback never raw PII; --pii-strict deferred	§P2-7 (OQ-3 sub-section); §D.3 unchanged but now bound; §P2-3 raw-PII rule
OQ-4	Plugin read-only-if-hideable else replace; all writes via service + SafetyLayer	§P2-7 (OQ-4 sub-section); §F.1/F.3 unchanged but now bound; concrete host check moves into Sprint 2 acceptance
OQ-5	batch_delete default 100 in lark-api-limits.yaml; raise only after doc/probe; reject over-ceiling explicit requests	§P2-7 (OQ-5 sub-section); §B.4 unchanged but now bound
OQ-7	Retain orphan + log; 7-day grace; sweep explicit + audited + Sprint 4	§P2-6 (full design correction); §C.6 inline "delete-if-safe" removed

All five closed OQs are folded. None remain as open questions in §J of PATCH2.

5. README / index status

Created. knowledge/dev/lark/s177-controlled-crud-gateway/README.md did not previously exist (confirmed missing in the SSOT batch read). PATCH2 ships a new README that lists, in human-readable order:

1. Requirements v2.2 (path: knowledge/dev/lark/s177-controlled-crud-gateway-requirements-v2.md — parent folder, kept where it lives)
2. Base architecture design (the un-patched original) — referenced by hash from PATCH1 header (file lives one level up where the SSOT graph already points)
3. PATCH1 — s177-architecture-design-2026-05-19-patch1.md
4. OQ decision record — s177-oq-decision-record-2026-05-19.md
5. R0 code reconcile report — s177-r0-code-reconcile-report-2026-05-19.md
6. PATCH2 (this round) — s177-architecture-design-2026-05-19-patch2.md
7. PATCH2 summary (this file) — s177-design-patch2-summary-2026-05-19.md
8. Current gate status + next step

6. KB paths created / updated this round

Path	Action
knowledge/dev/lark/s177-controlled-crud-gateway/s177-architecture-design-2026-05-19-patch2.md	CREATED — full PATCH2 design
knowledge/dev/lark/s177-controlled-crud-gateway/s177-design-patch2-summary-2026-05-19.md	CREATED — this summary
knowledge/dev/lark/s177-controlled-crud-gateway/README.md	CREATED — folder index (did not previously exist)

No other KB documents were modified.

7. Remaining blockers

Blocker	Status	Owner / unblock path
OQ-6 — commit / repo path mechanics	OPEN — environment-only	Requires a repo+shell-capable actor; not solvable from this agent's environment
OQ-8 — Lark client_token per-endpoint support	OPEN — Sprint 0.5 micro-task	30-minute Lark Open API doc citation; lands in knowledge/dev/lark/ and write_endpoint_options: block
OQ-9 — exact shape of existing write: entries	OPEN — Sprint 0.5 micro-task	30-minute read of config/allowed_endpoints.yaml; pick bare-string vs structured-object shape; PATCH2 supports either; no schema invention

OQ-8 and OQ-9 are not blockers for accepting PATCH2 as a design. They are short read-only verifications that can be performed by the Sprint 1 implementation actor as part of the same commit. OQ-6 is the only remaining environment limitation; it blocks repo commit but not KB review of the design.

8. Recommendations

• Design commit: RECOMMENDED. PATCH2 is interface-binding aligned with live source after R0; OQ closures are folded; no new drift was discovered during authoring. The design is sufficient and stable enough to commit, gated only on OQ-6 (environment).
• Sprint 1 command package preparation: CAN START NEXT under a separate authorization. PATCH2 contains enough binding detail (exception list, exit-code routing, LarkCore.write signature, AuditLogger method signatures + entry schemas, conftest.py shape, endpoint enumeration, lark-api-limits.yaml content shape) for the next actor to draft a Sprint 1 command-review document without re-inspecting source.
• Sprint 1 code authoring: NOT AUTHORIZED. Sprint 1 code remains gated on (a) PATCH2 acceptance by GPT/User, (b) Sprint 1 command-review package approved separately, (c) OQ-6 environment resolution.

9. Explicit "did not do" confirmation

For the record, in this PATCH2 round the agent:

• did not write any code (no .py, no .yaml in lark_client//cli//tests//config/)
• did not mutate /opt/incomex/lark-client/ (no read tool call against the VPS was made in this round either — all source-level evidence is taken from the R0 report)
• did not create, amend, push, or rebase any git commit
• did not call any Lark Open API endpoint (no read, no write)
• did not create a bot or rotate any credential
• did not deploy, restart, or modify any service
• did not enable any MCP write tool
• did not run any production test
• did not create any document outside the sanctioned folder knowledge/dev/lark/s177-controlled-crud-gateway/
• did not self-advance toward Sprint 1 implementation

KB document creation in the sanctioned folder is the only mutation performed. STOP — routing back to GPT/User for PATCH2 acceptance review.

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S177 PATCH2 summary complete. PASS. Next step: GPT/User acceptance of PATCH2, then separately-authorized Sprint 1 command-review package preparation.