fix(security): healthz/readyz, request framing, trace authority on main

[seonghobae]

Summary

Main-base security gap fill for buyer-visible operability and least privilege:

• fix(security): split minimal liveness from authenticated readiness evidence #118 — Unauthenticated GET /healthz returns only process liveness (status + service). Inventory (agent counts, batch backends, usage counts) moves to admin-authenticated GET /readyz.
• fix(security): reject ambiguous and unbounded inbound HTTP request framing #119 — Fail-closed Content-Length validation rejects missing, negative, non-decimal, oversized, and non-identity Transfer-Encoding before socket body reads.
• fix(security): separate orchestration-trace authority from inference access #117 — Orchestration traces require verified admin-scope authority; inference-only callers cannot obtain planner/workflow structure via include_orchestration_trace.

Tests

• tests/test_healthz.py
• tests/test_request_framing.py
• tests/test_trace_authority.py
• Related security suite subset (23 passed locally)

Relation to #121

#121 tracks the same issues on a parallel tip. This PR is a main-base delivery of the same security contract so protected main can land the gap independently of the approval-deadlocked stack.

Doctoring

• CHANGELOG.md Security section
• docs/architecture.md health/readiness note

Closes #117
Closes #118
Closes #119

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Review details

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 1aa838d9-8961-45dd-9e15-d6e6c117ee01

📥 Commits

Reviewing files that changed from the base of the PR and between 6841b71 and b4f37ff.

📒 Files selected for processing (10)

• CHANGELOG.md
• README.md
• contextual_orchestrator/cost_ledger.py
• contextual_orchestrator/orchestrator.py
• contextual_orchestrator/server.py
• docs/architecture.md
• tests/test_cost_review_server.py
• tests/test_healthz.py
• tests/test_request_framing.py
• tests/test_trace_authority.py

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[opencode-agent]

Pull request overview

OpenCode cannot approve yet because required coverage evidence did not pass.

Review outcome

1. HIGH .github/workflows/opencode-review.yml:1 - Coverage evidence did not prove required test/docstring evidence

• Problem: The required coverage-evidence job result was failure, so OpenCode cannot establish approval sufficiency for this head.

• Root cause: Automated approval is only valid when the same-head coverage-evidence job proves supported repository test suites passed and configured docstring gates passed or were advisory, or reports not applicable because no supported source files or package manifests exist. Missing, failed, skipped, unavailable, or unsupported-tooling test evidence is a blocker.

• Fix: Install or configure the repository test/docstring evidence tooling when source files or package manifests exist, rerun the current-head coverage-evidence job, and approve only after it reports success with required evidence or explicit no-source not-applicable evidence.

• Regression test: Keep the approval branch checking needs.coverage-evidence.result == success before posting APPROVE, and publish REQUEST_CHANGES when coverage-evidence blocker states such as cancelled, skipped, failed, unsupported-tooling, or below-100 evidence are present.

• Result: REQUEST_CHANGES

• Reason: coverage-evidence result was failure, so required test/docstring evidence was not proven for current head b4f37ff9fdf924aa75095ab1e77c58474ca8d4de.

• Head SHA: b4f37ff9fdf924aa75095ab1e77c58474ca8d4de

• Workflow run: 31702379909

• Workflow attempt: 1

Coverage evidence

Coverage evidence job did not run or did not publish coverage evidence.

Changed-File Evidence Map

flowchart LR
  PR["PR changed files"] --> Evidence["OpenCode bounded evidence"]
  Evidence --> S1["Changed file (5 files)"]
  S1 --> I1["repository behavior"]
  I1 --> R1["Review risk: Changed file (5 files)"]
  R1 --> V1["required checks"]
  Evidence --> S2["Docs: architecture.md"]
  S2 --> I2["operator or user guidance"]
  I2 --> R2["Review risk: Docs: architecture.md"]
  R2 --> V2["docs review"]
  Evidence --> S3["Test (4 files)"]
  S3 --> I3["regression suite"]
  I3 --> R3["Review risk: Test (4 files)"]
  R3 --> V3["targeted test run"]

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[opencode-agent]

OpenCode Review Overview

• Head SHA: b4f37ff9fdf924aa75095ab1e77c58474ca8d4de
• Workflow run: 31702379909
• Workflow attempt: 1
• Gate result: REQUEST_CHANGES (approval step)

Pull request overview

OpenCode cannot approve yet because required coverage evidence did not pass.

Review outcome

1. HIGH .github/workflows/opencode-review.yml:1 - Coverage evidence did not prove required test/docstring evidence

• Problem: The required coverage-evidence job result was failure, so OpenCode cannot establish approval sufficiency for this head.

• Root cause: Automated approval is only valid when the same-head coverage-evidence job proves supported repository test suites passed and configured docstring gates passed or were advisory, or reports not applicable because no supported source files or package manifests exist. Missing, failed, skipped, unavailable, or unsupported-tooling test evidence is a blocker.

• Fix: Install or configure the repository test/docstring evidence tooling when source files or package manifests exist, rerun the current-head coverage-evidence job, and approve only after it reports success with required evidence or explicit no-source not-applicable evidence.

• Regression test: Keep the approval branch checking needs.coverage-evidence.result == success before posting APPROVE, and publish REQUEST_CHANGES when coverage-evidence blocker states such as cancelled, skipped, failed, unsupported-tooling, or below-100 evidence are present.

• Result: REQUEST_CHANGES

• Reason: coverage-evidence result was failure, so required test/docstring evidence was not proven for current head b4f37ff9fdf924aa75095ab1e77c58474ca8d4de.

• Head SHA: b4f37ff9fdf924aa75095ab1e77c58474ca8d4de

• Workflow run: 31702379909

• Workflow attempt: 1

Coverage evidence

Coverage evidence job did not run or did not publish coverage evidence.

Changed-File Evidence Map

flowchart LR
  PR["PR changed files"] --> Evidence["OpenCode bounded evidence"]
  Evidence --> S1["Changed file (5 files)"]
  S1 --> I1["repository behavior"]
  I1 --> R1["Review risk: Changed file (5 files)"]
  R1 --> V1["required checks"]
  Evidence --> S2["Docs: architecture.md"]
  S2 --> I2["operator or user guidance"]
  I2 --> R2["Review risk: Docs: architecture.md"]
  R2 --> V2["docs review"]
  Evidence --> S3["Test (4 files)"]
  S3 --> I3["regression suite"]
  I3 --> R3["Review risk: Test (4 files)"]
  R3 --> V3["targeted test run"]

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