update AGENTS.md and create pkg level AGENTS.md

[mashenjun]

Summary by CodeRabbit

• Documentation
  • Added comprehensive architecture and operational docs for core components (backend, datastore, FUSE layer, HTTP server)
  • Clarified project layout and corrected Go module path
  • Expanded CI pipeline and workflow notes, including non-standard CI steps and linter behavior
  • Established package-level coding conventions, runtime/operation guidance, and testing/anti-patterns guidance

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 2670c13f-0d3c-4782-b949-311bef67d519

📥 Commits

Reviewing files that changed from the base of the PR and between 515c27f and 4d21ebb.

📒 Files selected for processing (5)

• AGENTS.md
• pkg/backend/AGENTS.md
• pkg/datastore/AGENTS.md
• pkg/fuse/AGENTS.md
• pkg/server/AGENTS.md

📝 Walkthrough

Walkthrough

Adds and updates AGENTS.md guides: corrects root module/CI/layout docs and introduces package-level architecture guides for backend, datastore, FUSE, and server subsystems (documentation-only changes).

Changes

Architectural Documentation Updates

Layer / File(s)	Summary
Root repository documentation AGENTS.md	Root documentation corrected to module path github.com/mem9-ai/dat9, CI pipeline expanded with workflows and non-standard steps (failpoint rewriting, self-archiving, TiDB playground smoke tests, git-derived versioning), added cmd/drive9-server-local, and project layout restructured.
Backend package documentation pkg/backend/AGENTS.md	Backend package scope (filesystem operations, uploads, quotas, GC, extractors, metrics) documented with file/module map, package conventions (context pairs, quota outbox/replay, sentinel rules, DI, ULID IDs, no sub-packages), quota architecture, and key types.
Datastore persistence layer documentation pkg/datastore/AGENTS.md	TiDB/MySQL metadata store documented with responsibilities (files, tags, uploads, indexing), module map, sentinel error list and handling rules, key types/constants, schema/table guidance, transaction/context/pointer/constructor conventions, testing reset order, and anti-patterns.
FUSE mount layer documentation pkg/fuse/AGENTS.md	FUSE mount implementation documented: subsystem file map, write classification modes, crash and startup recovery ordering, read priority cascade, locking/thread-safety conventions for WriteBuffer and FileHandle, anti-patterns, failpoint test guidance, and key types.
HTTP server documentation pkg/server/AGENTS.md	HTTP server documented with route dispatch (/v1/fs/*), tenant/FS-scoped auth middleware and admission gating, handler conventions (authorize then backend resolution, JSON error style), background workers (semantic leasing, S3 GC), and key types.

Estimated Code Review Effort

🎯 2 (Simple) | ⏱️ ~12 minutes

Possibly related PRs

• mem9-ai/drive9#240: Related to CI/test setup; this PR expands CI pipeline notes including failpoint handling while that PR modified go.mod for pingcap/failpoint.

Suggested Reviewers

• srstack
• qiffang

Poem

🐰 I hopped through docs in morning light,
Wrote guides so subsystems read right,
FUSE and server, store and backend,
Lines of wisdom, clear and penned,
— a rabbit’s nudge to ship tonight!

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title directly reflects the main changes: updating the root AGENTS.md file and creating new AGENTS.md documentation files at the package level (pkg/backend, pkg/datastore, pkg/fuse, pkg/server).
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch shenjun/update-agents-md

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[coderabbitai]

Actionable comments posted: 4

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@AGENTS.md`:
- Around line 23-36: The fenced CI pipeline block (the triple-backtick code
fence containing "PR → code-ci.yml (lint + test + failpoint + build)" through
"SDK changes (PR/push) → sdk-ci.yml (5 language SDKs in parallel)") is missing a
language tag and triggers markdownlint MD040; add a language identifier (use
text or bash) immediately after the opening ``` to become ```text (or ```bash)
so the block is properly tagged and linting passes.

In `@pkg/fuse/AGENTS.md`:
- Around line 35-37: The "Read priority chain (10-step cascade)" heading
conflicts with the listed nine stages in the line "local-only → shadow →
dirty-buf → shadow-store → writeback-cache → prefetcher → read-cache →
small-file-http → range-read"; either add the missing stage into that
arrow-separated sequence (insert the correct step in the appropriate position)
or change the heading text to the correct count (e.g., "9-step cascade") so the
header and the listed stages match; update the header string "Read priority
chain (10-step cascade)" and/or the sequence line to keep them consistent.

In `@pkg/server/AGENTS.md`:
- Line 30: The FS routing docs incorrectly map GET ?stat to handleStat; update
the documentation so GET ?stat is documented as dispatching to
handleStatMetadata and HEAD ?stat dispatches to handleStat (or otherwise mirror
the actual router behavior). Locate the line describing "GET ?stat → handleStat"
in the FS routing section and change the target symbol to handleStatMetadata,
and mention that HEAD requests map to handleStat to match the implementation.
- Line 34: The doc line about tenantAuthMiddleware incorrectly states that the
scoped-token admission gate (isScopedBusinessRequestAllowed) only admits FS
routes; update the sentence to reflect that isScopedBusinessRequestAllowed
admits both FS endpoints (which then go through authorizeFS for per-operation
checks) and the scoped V1/V2 upload routes that are allowlisted for scoped
tokens; mention the related symbols isScopedBusinessRequestAllowed,
authorizeFS(w, r, FSOpXxx, path), and FS-scoped tokens so the auth contract
matches the dispatcher behavior.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 64c5ce3f-ab42-4aab-8cea-3bdb0de9fb1d

📥 Commits

Reviewing files that changed from the base of the PR and between 3455503 and a03d68c.

📒 Files selected for processing (5)

• AGENTS.md
• pkg/backend/AGENTS.md
• pkg/datastore/AGENTS.md
• pkg/fuse/AGENTS.md
• pkg/server/AGENTS.md

[mashenjun]

@codex review

PR: #473
Repository: mem9-ai/drive9
Current PR head SHA: 515c27f
Base: main at 3455503
Head branch: shenjun/update-agents-md
Review classification: first review

Reason for classification: I found no previous Codex review baseline for this PR. Existing review evidence is CodeRabbit-only: one prior CodeRabbit review with 4 actionable comments, then a later CodeRabbit summary reporting no actionable comments. Treat this as the first Codex review of the current PR head.

Do not load or run second-opinion. Do not rely on second-opinion artifacts. Review the current PR diff and repository evidence directly.

Current PR summary:

1. Documentation-only PR.
2. Updates root AGENTS.md to correct module path documentation to github.com/mem9-ai/dat9, expand CI/build/test/lint/local-dev/project-layout guidance, and add structural notes.
3. Adds package-level AGENTS.md guidance for pkg/backend, pkg/datastore, pkg/fuse, and pkg/server.
4. Changed files: AGENTS.md, pkg/backend/AGENTS.md, pkg/datastore/AGENTS.md, pkg/fuse/AGENTS.md, pkg/server/AGENTS.md.

Changed risky code paths to inspect:

1. AGENTS.md: module path, import examples, CI workflow names, build/test/lint commands, local-dev commands, project layout, schema synchronization guidance, and any agent approval or operational instructions. Verify documentation does not contradict go.mod, Makefile, .github/workflows, scripts, or repository rules.
2. pkg/backend/AGENTS.md: backend architecture claims around Dat9Backend, upload protocols, quota source/outbox/replay behavior, file GC, object GC, semantic task enqueueing, image/audio extractors, runtime metrics, sentinels, and package conventions. Verify against pkg/backend source.
3. pkg/datastore/AGENTS.md: datastore file map, sentinel errors, schema/table claims, transaction/context conventions, typed constants, ResetDB order, and schema source-of-truth claims. Verify against pkg/datastore, internal/testmysql, and pkg/tenant/schema.
4. pkg/fuse/AGENTS.md: FUSE write-mode classification, crash-recovery ordering, read-priority cascade, FileHandle/WriteBuffer locking requirements, failpoint guidance, and key type list. Verify against pkg/fuse source, especially mount.go, dat9fs.go, write.go, shadow.go, pending_index.go, journal.go, and commit_queue.go.
5. pkg/server/AGENTS.md: HTTP route dispatch, handleFS method/query mapping, scoped-token admission, authorizeFS per-operation checks, upload V1/V2 routes, handler conventions, background workers, and chmod restrictions. Verify against pkg/server/server.go, auth.go, and fs_authorization.go.

Stable charter invariants:

1. The root module path must remain documented as github.com/mem9-ai/dat9, not github.com/mem9-ai/drive9.
2. Root documentation must keep the CI, build, lint, test, local dev, project layout, and schema synchronization guidance internally consistent with the repository.
3. Markdown code fences in changed docs should use language tags where linting expects them.
4. Package docs must describe existing behavior rather than aspirational behavior.
5. pkg/fuse/AGENTS.md must keep stage counts consistent with listed pipeline stages.
6. pkg/server/AGENTS.md must document GET ?stat -> handleStatMetadata and HEAD ?stat -> handleStat.
7. pkg/server/AGENTS.md must state that isScopedBusinessRequestAllowed admits FS endpoints and allowlisted scoped V1/V2 upload routes, while FS operations still use authorizeFS(w, r, FSOpXxx, path).
8. Documentation changes must avoid operationally misleading command, route, schema, or test guidance.

PR readiness P0/P1/P2 rubric:

P0:

1. Documentation instructs agents to perform destructive or insecure actions without required approval gates.
2. Documentation contradicts core production behavior in a way likely to cause data loss, security exposure, or broken deployments.

P1:

1. Documentation gives incorrect build, test, CI, auth, routing, schema, or operational instructions likely to break normal developer or agent workflows.
2. Package-level guidance conflicts with root repository rules in a way likely to mislead future code changes.

P2:

1. Documentation is ambiguous, stale, or internally inconsistent with bounded impact.
2. Lint-sensitive formatting issues remain in changed markdown.
3. Naming, counts, paths, or command examples are inaccurate but unlikely to cause immediate production risk.

Prior fixed or resolved findings. Do not repeat these unless current head introduces a new failure path:

1. AGENTS.md CI fenced block missing a language tag. Current head has a text-tagged fence for the CI pipeline block at AGENTS.md line 23. Do not repeat unless the current diff contains another changed untagged fence that is actually lint-sensitive.
2. pkg/fuse/AGENTS.md read cascade count mismatch. Current head says "9-step cascade" and lists nine stages. Do not repeat unless the count and listed stages diverge again.
3. pkg/server/AGENTS.md GET ?stat dispatch target. Current head documents GET ?stat -> handleStatMetadata and HEAD ?stat -> handleStat. Do not repeat unless repository code or docs now contradict this mapping.
4. pkg/server/AGENTS.md scoped-token gate description. Current head documents that isScopedBusinessRequestAllowed admits FS endpoints plus allowlisted scoped V1/V2 upload routes, while FS endpoints still go through authorizeFS. Do not repeat unless the current head still has a distinct auth-contract mismatch.

Current review-thread state:

1. GitHub reviewThreads: 4 total, 0 unresolved.
2. All 4 prior CodeRabbit threads are resolved and outdated.
3. Round 1 responder made no code changes, pushed no commits, posted no replies, and resolved no threads because there were no unresolved findings at round start.

Embedded review discipline:

Review scope:

1. Classify each round as first review, incremental review, or targeted verification.
2. Use first review when there is no previously reviewed baseline.
3. Use incremental review after the first baseline; focus on the diff since that baseline and re-check prior findings only when touched by new changes.
4. Use targeted verification only when the round is explicitly about verifying named prior findings.

Baseline scan:

1. Always scan in-scope changes for high-severity correctness, security, data consistency, performance, compatibility, observability, and testing risks.
2. Expert or prompt focus areas are minimum requirements, not the full scope.
3. Report only concrete bugs with plausible failure paths.

Finding contract:

1. Order findings by severity, then confidence.
2. Each finding must include Severity, Confidence, What, Evidence, Impact, Fix, and Verify.
3. Severity values are Blocker, High, Medium, and Low.
4. Confidence values are High, Medium, and Low.
5. Do not duplicate the same finding across multiple comments.
6. Do not report speculative, style-only, or preference-only findings.
7. If no issues are found, state "No issues found" and list concrete checks performed.

Severity guidance:

1. Blocker: prevents merge due to data loss, security exposure, corruption, broken core workflow, or irreversible operational risk.
2. High: likely user-visible correctness, concurrency, compatibility, migration, or reliability failure.
3. Medium: real defect with bounded impact, edge-case trigger, or missing validation that can cause incorrect behavior.
4. Low: non-blocking issue with clear value and low risk.

Please review for concrete bugs only. A valid finding must identify a plausible failure path in which the changed documentation would mislead a future agent or developer into a broken command, incorrect code change, invalid operational action, security/auth mistake, data-risking workflow, or lint failure. Do not report style preferences, broad documentation improvement ideas, or already-resolved CodeRabbit findings without a new current-head failure path.

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: 515c27fadb

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".

[mashenjun]

@codex review

PR: #473
Repository: mem9-ai/drive9
Current PR head SHA: 4d21ebb
Base branch: main
Base SHA: 3455503
Head branch: shenjun/update-agents-md
Review classification: incremental review

Reason for classification: a previous Codex review baseline exists at 515c27f. Review the current PR head as an incremental review from that baseline to 4d21ebb, while still checking for regressions in the full changed documentation surface.

Do not load or run second-opinion. This prompt is self-contained. Review the current PR diff and repository evidence directly.

GitHub state verified for this prompt:

1. PR is open and mergeable.
2. Current head SHA is 4d21ebb.
3. Compare 515c27f..4d21ebb is ahead by 1 commit, behind by 0.
4. Incremental commit: 4d21ebb, docs: address AGENTS review feedback.
5. Changed files in the PR: AGENTS.md, pkg/backend/AGENTS.md, pkg/datastore/AGENTS.md, pkg/fuse/AGENTS.md, pkg/server/AGENTS.md.
6. Incremental diff since prior Codex baseline touches the same 5 files, with 24 insertions and 21 deletions.
7. GitHub reviewThreads currently show 15 total threads and 0 unresolved threads.

Stable charter invariants:

1. The root module path must remain documented as github.com/mem9-ai/dat9, not github.com/mem9-ai/drive9.
2. Root documentation must keep the CI, build, lint, test, local dev, project layout, and schema synchronization guidance internally consistent with the repository.
3. Markdown code fences in changed docs should use language tags where linting expects them.
4. Package docs must describe existing behavior rather than aspirational behavior.
5. pkg/fuse/AGENTS.md must keep stage counts consistent with listed pipeline stages.
6. pkg/server/AGENTS.md must document GET ?stat -> handleStatMetadata and HEAD ?stat -> handleStat.
7. pkg/server/AGENTS.md must state that isScopedBusinessRequestAllowed admits FS endpoints and allowlisted scoped V1/V2 upload routes, while FS operations still use authorizeFS(w, r, FSOpXxx, path).
8. Documentation changes must avoid operationally misleading command, route, schema, or test guidance.

PR readiness P0/P1/P2 rubric:

P0:

1. Documentation instructs agents to perform destructive or insecure actions without the required approval gates.
2. Documentation contradicts core production behavior in a way likely to cause data loss, security exposure, or broken deployments.

P1:

1. Documentation gives incorrect build, test, CI, auth, routing, schema, or operational instructions likely to break normal developer or agent workflows.
2. Package-level guidance conflicts with root repository rules in a way likely to mislead future code changes.

P2:

1. Documentation is ambiguous, stale, or internally inconsistent with bounded impact.
2. Lint-sensitive formatting issues remain in changed markdown.
3. Naming, counts, paths, or command examples are inaccurate but unlikely to cause immediate production risk.

Changes since the previous Codex review baseline:

1. AGENTS.md: changed the Go import example from github.com/mem9-ai/drive9/pkg/logger to github.com/mem9-ai/dat9/pkg/logger.
2. pkg/backend/AGENTS.md: changed durable quota outbox guidance to log insert first, then transactional apply plus mark-applied.
3. pkg/backend/AGENTS.md: changed quota architecture guidance to dispatch by QuotaSource, with server quota using central quota/reservations and skipping tenant-DB upload checks after the server-reserve-first saga.
4. pkg/datastore/AGENTS.md: regenerated the datastore file map to remove nonexistent files and add current files including file_tx.go, inode.go, content.go, semantic_tasks.go, file_gc_tasks.go, embedding_writeback.go, storage_ref_hash.go, and llm_usage.go.
5. pkg/datastore/AGENTS.md: replaced the stale sentinel list with 12 current store.go sentinels.
6. pkg/datastore/AGENTS.md: replaced nonexistent NodeType and StatusType guidance with current StorageType, StorageEncryptionMode, FileStatus, and UploadStatus guidance.
7. pkg/datastore/AGENTS.md: changed schema guidance to include pkg/tenant/schema/tidb_auto.go, pkg/tenant/schema/tidb_app.go, and pkg/tenant/db9/schema.go, and defer to the root schema synchronization section.
8. pkg/datastore/AGENTS.md: changed the transaction primitive to InTx(ctx context.Context, func(tx *sql.Tx) error) error.
9. pkg/fuse/AGENTS.md: changed small-file direct PUT guidance from fixed <50KB to below negotiated server inline threshold.
10. pkg/fuse/AGENTS.md: changed startup recovery order to PendingIndex.RecoverFromDisk -> Journal.Replay -> CommitQueue.RecoverPending.
11. pkg/server/AGENTS.md: changed handler pattern guidance to call authorizeFS at top for ordinary FS operations, with handleChmod as an explicit exception that must keep scoped-token fail-closed behavior instead of using authorizeFS(FSOpWrite).

Changed risky documentation paths to inspect:

1. AGENTS.md: module path and import examples. Verify no remaining changed root guidance points agents to github.com/mem9-ai/drive9 for Go imports or contradicts go.mod.
2. pkg/backend/AGENTS.md: quota outbox and quota-source guidance. Verify docs match applyLoggedQuotaMutation, ensureStorageQuota, ensureStorageQuotaServer, reserveUploadOnServer, and upload initiation behavior.
3. pkg/datastore/AGENTS.md: file map, sentinel list, key types, typed constants, schema source guidance, and InTx signature. Verify docs match current pkg/datastore files, pkg/datastore/store.go, and tenant schema source files.
4. pkg/fuse/AGENTS.md: direct PUT threshold guidance and startup recovery order. Verify docs match negotiatedInlineThreshold/directPutThreshold behavior and mount.go recovery order.
5. pkg/server/AGENTS.md: scoped-token route/auth guidance, GET/HEAD stat dispatch, and handleChmod exception. Verify docs match server.go and fs_authorization.go.

Accepted findings from the prior Codex review and their fixed status:

1. ACCEPT fixed/resolved: pkg/fuse/AGENTS.md recovery order. 4d21ebb documents PendingIndex.RecoverFromDisk -> Journal.Replay -> CommitQueue.RecoverPending. Do not repeat unless current head still creates a distinct recovery-order failure path.
2. ACCEPT fixed/resolved: pkg/datastore/AGENTS.md stale sentinel list. 4d21ebb documents 12 current store.go sentinel errors. Do not repeat unless a current-head sentinel mismatch remains.
3. ACCEPT fixed/resolved: pkg/fuse/AGENTS.md fixed <50KB direct PUT threshold. 4d21ebb documents below negotiated server inline threshold. Do not repeat unless current head still suggests the unsafe historical fixed threshold.
4. ACCEPT fixed/resolved: pkg/datastore/AGENTS.md incomplete tenant schema sources. 4d21ebb lists tidb_auto.go, tidb_app.go, and db9/schema.go. Do not repeat unless current head still omits a schema source or gives unsafe schema-sync guidance.
5. ACCEPT fixed/resolved: pkg/datastore/AGENTS.md incorrect InTx signature. 4d21ebb documents InTx(ctx context.Context, func(tx *sql.Tx) error) error. Do not repeat unless current head still implies omitting context.
6. ACCEPT fixed/resolved: pkg/datastore/AGENTS.md nonexistent NodeType/StatusType guidance. 4d21ebb documents current StorageType, StorageEncryptionMode, FileStatus, and UploadStatus constants. Do not repeat unless current head still references nonexistent enum types or invalid lifecycle values.
7. ACCEPT fixed/resolved: pkg/datastore/AGENTS.md nonexistent file map entries. 4d21ebb regenerates the file map. Do not repeat unless current head still points to nonexistent files or misses a materially important current file in a way that causes a plausible failure.
8. ACCEPT fixed/resolved: AGENTS.md stale drive9 import example. 4d21ebb changes it to github.com/mem9-ai/dat9/pkg/logger. Do not repeat unless current head has another concrete bad import-path example.
9. ACCEPT fixed/resolved: pkg/backend/AGENTS.md quota outbox transaction boundary. 4d21ebb documents durable log insert first, then transactional apply plus mark-applied. Do not repeat unless current head still misstates the durable replay guarantee.
10. ACCEPT fixed/resolved: pkg/backend/AGENTS.md server quota tenant-first wording. 4d21ebb documents dispatch by QuotaSource and server-reserve-first behavior. Do not repeat unless current head still guides future code toward stale tenant-first enforcement under server quota.
11. ACCEPT fixed/resolved: pkg/server/AGENTS.md chmod authorizeFS exception. 4d21ebb documents handleChmod as the explicit exception. Do not repeat unless current head still enables a plausible scoped-token chmod authorization failure path.

Previously resolved CodeRabbit findings:

1. Fixed/resolved: AGENTS.md CI fenced block missing language tag. Do not repeat unless current head introduces another lint-sensitive untagged changed fence.
2. Fixed/resolved: pkg/fuse/AGENTS.md read cascade count mismatch. Do not repeat unless current head has a count/list mismatch.
3. Fixed/resolved: pkg/server/AGENTS.md GET ?stat handler mapping. Do not repeat unless current head contradicts GET ?stat -> handleStatMetadata and HEAD ?stat -> handleStat.
4. Fixed/resolved: pkg/server/AGENTS.md scoped-token gate description too narrow. Do not repeat unless current head still contradicts the FS plus allowlisted V1/V2 upload-route admission contract.

Rejected findings:

1. None. The round-2 responder accepted all 11 Codex findings.

Still-open findings:

1. None found in the current GitHub reviewThreads refresh. Treat all resolved or accepted findings above as do-not-repeat unless current head introduces a new failure path.

Minimum repository evidence pointers for verification:

1. go.mod declares module github.com/mem9-ai/dat9.
2. AGENTS.md currently has the dat9 import example in the Go import block.
3. pkg/backend/quota_mutation.go has applyLoggedQuotaMutation inserting the mutation log before metaStore.InTx applies and marks it applied.
4. pkg/backend/quota.go dispatches storage quota checks by UseServerQuota/QuotaSource and calls ensureStorageQuotaServer for server quota small writes.
5. pkg/backend/upload.go skips tenant-DB upload quota checks when server quota is active after reserveUploadOnServer.
6. pkg/datastore/store.go defines the 12 documented sentinels, the InTx(ctx context.Context, ...) signature, and current typed constants.
7. pkg/fuse/dat9fs.go uses negotiatedInlineThreshold for direct PUT decisions, with comments rejecting the historical 50KB fallback for upload decisions.
8. pkg/fuse/mount.go recovers PendingIndex before Journal replay, then calls CommitQueue.RecoverPending.
9. pkg/server/server.go routes GET ?stat to handleStatMetadata and HEAD to handleStat.
10. pkg/server/server.go keeps handleChmod scoped-token fail-closed, while pkg/server/fs_authorization.go has no chmod FSOp.

Embedded review discipline:

Review scope:

1. Classify each round as first review, incremental review, or targeted verification.
2. Use first review when there is no previously reviewed baseline.
3. Use incremental review after the first baseline; focus on the diff since that baseline and re-check prior findings only when touched by new changes.
4. Use targeted verification only when the round is explicitly about verifying named prior findings.

Baseline scan:

1. Always scan in-scope changes for high-severity correctness, security, data consistency, performance, compatibility, observability, and testing risks.
2. Expert or prompt focus areas are minimum requirements, not the full scope.
3. Report only concrete bugs with plausible failure paths.

Finding contract:

1. Order findings by severity, then confidence.
2. Each finding must include Severity, Confidence, What, Evidence, Impact, Fix, and Verify.
3. Severity values are Blocker, High, Medium, and Low.
4. Confidence values are High, Medium, and Low.
5. Do not duplicate the same finding across multiple comments.
6. Do not report speculative, style-only, or preference-only findings.
7. If no issues are found, state "No issues found" and list concrete checks performed.

Severity guidance:

1. Blocker: prevents merge due to data loss, security exposure, corruption, broken core workflow, or irreversible operational risk.
2. High: likely user-visible correctness, concurrency, compatibility, migration, or reliability failure.
3. Medium: real defect with bounded impact, edge-case trigger, or missing validation that can cause incorrect behavior.
4. Low: non-blocking issue with clear value and low risk.

Please review for concrete bugs only. A valid finding must identify a plausible failure path in which the changed documentation would mislead a future agent or developer into a broken command, incorrect code change, invalid operational action, security/auth mistake, data-risking workflow, or lint failure. Focus on verifying the fixes in 4d21ebb, changed documentation paths, and regressions introduced since 515c27f. Do not report style preferences, broad documentation improvement ideas, or already-resolved findings without a new current-head failure path.

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Keep it up!

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".