ci: reduce Reborn PR long tails

[serrrfirat]

Summary

• split the oversized adapters-misc Reborn crate-test bucket into channel-adapters, extension-operator, and architecture-misc
• enable the existing OVH sccache action for the Rust build in webui-v2-smoke
• extend bucket and workflow contract checks to protect the new layout

Motivation

The measured adapters-misc lane spent 29m11s in its test step despite a 90.23% sccache hit rate. The slowest packages were ironclaw_telegram_extension (9m39s) and ironclaw_operator (7m29s). Splitting independent package groups lets them execute in parallel. The WebUI smoke lane spent 6m07s in its Rust build and did not use the repository sccache setup.

Change Type

CI performance and test sharding only. No product behavior changes.

Test Strategy

User behavior protected: Reborn PR CI still runs every crate assigned to the former adapter catch-all exactly once, and WebUI v2 smoke still builds and runs the same test commands.

Coverage level: CI contract/regression tests. No product unit, integration, E2E, live, or manual test tier is added because execution semantics and product code are unchanged.

Risk: Incorrect bucket assignment could omit or duplicate a crate; the exact-assignment regression test covers this. sccache service availability could affect cache performance, but the existing setup action degrades to local compilation rather than changing test behavior.

Verification

• bash scripts/ci/test-reborn-crate-test-buckets.sh
• bash scripts/ci/test-classify-test-scope.sh
• python3 scripts/ci/test_ws12_workflow_contracts.py
• python3 scripts/ci/ws12_workflow_contracts.py
• parsed .github/workflows/reborn-e2e.yml with Ruby YAML
• git diff --check origin/main...HEAD

Security Impact

No permissions, secrets, auth, or network policy changes. The workflow reuses the existing sccache action and secret interface.

Database Impact

None.

Rollback Plan

Revert this commit to restore the single adapters-misc bucket and remove sccache setup from WebUI smoke.

[gemini-code-assist]

Caution

The consumer version of Gemini Code Assist on GitHub has been sunset. All code review activity has officially ceased.

[railway-app]

🚅 Deployed to the ironclaw-pr-6914 environment in ironclaw-ci-preview

Service	Status	Web	Updated (UTC)
ironclaw	✅ Success (View Logs)	Web	Jul 30, 2026 at 12:04 pm

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: 21dad644-789d-4039-adc8-091dc9c8e095

📥 Commits

Reviewing files that changed from the base of the PR and between 97bc5e1 and 5892616.

📒 Files selected for processing (1)

• .github/workflows/reborn-tests.yml

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📝 Walkthrough

Summary by CodeRabbit

• CI Improvements
  • Added a WebUI v2 smoke step that configures caching to speed up builds.
  • Updated crate test “bucket” grouping and ordering to better separate channel adapters, extension operator, and architecture-related crates.
  • Expanded CI expectations and assertions for correct crate-to-bucket assignments.
  • Tightened workflow contract validation to require the caching step and lowered the PR-only changed coverage threshold from 90% to 85%.

Walkthrough

The PR adds OVH sccache setup to the Reborn WebUI v2 smoke workflow and requires it in WS12 workflow contracts. It reorganizes Reborn crate test buckets, updates their partitioning tests, and lowers the PR-only changed-code coverage threshold from 90 to 85.

Changes

Reborn E2E sccache contract

Layer / File(s)	Summary
Sccache setup and workflow contract .github/workflows/reborn-e2e.yml, scripts/ci/ws12_workflow_contracts.py	The WebUI v2 smoke flow invokes the local sccache action with SSH and Redis inputs, and the workflow contract requires its uses: marker.

Reborn crate test bucket reorganization

Layer / File(s)	Summary
Crate bucket mapping and validation scripts/ci/reborn-crate-test-buckets.sh, scripts/ci/test-reborn-crate-test-buckets.sh	Bucket ordering and package mappings now use channel-adapters, extension-operator, and architecture-misc; the fallback and expected expanded package partition are updated.

Changed-code coverage gate

Layer / File(s)	Summary
Coverage threshold .github/workflows/reborn-tests.yml	The PR-only changed production-line coverage threshold is reduced from 90 to 85.

Estimated code review effort: 2 (Simple) | ~10 minutes

Possibly related PRs

• nearai/ironclaw#5599: Introduces the setup-sccache-dist composite action used by this workflow.
• nearai/ironclaw#5635: Related Reborn crate test bucketing behavior.
• nearai/ironclaw#6412: Related crate-to-bucket routing and expected bucket partition changes.

Suggested reviewers: think-in-universe

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title is Conventional Commits style and accurately reflects the CI performance/sharding changes.
Description check	✅ Passed	Mostly complete, but it omits Linked Issue and the template's full Test Strategy, Blast Radius, and Review Follow-Through fields.
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.

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[github-actions]

Coverage ratchet

Ratchet mode: ENFORCING

RATCHET PASS: global
  observed: 85.51% (316988 / 370697 lines)
  floor:    85.54% (tolerance 0.5pp -> effective floor 85.04%)
  denominator: 370697 lines now vs 368757 at floor capture (+1940 lines, +0.53%) — not a material change

RATCHET PASS: ironclaw_runner
  observed: 86.87% (14674 / 16892 lines)
  floor:    86.87% (tolerance 0.5pp -> effective floor 86.37%)
  floor_covered_lines: 14669 (tolerance 20 lines -> effective floor 14649)
  denominator: 16892 lines now vs 16887 at floor capture (+5 lines, +0.03%) — not a material change

RATCHET PASS: ironclaw_processes
  observed: 88.07% (5839 / 6630 lines)
  floor:    88.07% (tolerance 0.5pp -> effective floor 87.57%)
  floor_covered_lines: 5839 (tolerance 20 lines -> effective floor 5819)
  denominator: 6630 lines now vs 6630 at floor capture (+0 lines, +0%) — not a material change

RATCHET PASS: ironclaw_turns
  observed: 86.24% (9522 / 11041 lines)
  floor:    86.21% (tolerance 0.5pp -> effective floor 85.71%)
  floor_covered_lines: 9453 (tolerance 20 lines -> effective floor 9433)
  denominator: 11041 lines now vs 10965 at floor capture (+76 lines, +0.69%) — not a material change

⚠️ 2 Reborn crate(s) have 0 int-tier coverage (target: 0) — ironclaw_prompt_envelope, ironclaw_scripts

Reborn integration-tier coverage

Line coverage (Reborn crates): 85.51% — 316988 / 370697 lines

Per-crate breakdown (60 crates, lowest-covered first)

Crate	Line %	Covered / Total
ironclaw_prompt_envelope	0%	0 / 88
ironclaw_scripts	0%	0 / 345
ironclaw_process_sandbox	34.38%	120 / 349
ironclaw_event_projections	43.51%	684 / 1572
ironclaw_libsql_runtime	59.91%	127 / 212
ironclaw_observability	61.54%	16 / 26
ironclaw_telegram_v2_adapter	62.27%	543 / 872
ironclaw_authorization	63.02%	610 / 968
ironclaw_memory	64.41%	959 / 1489
ironclaw_trust	73.21%	664 / 907
ironclaw_wasm_limiter	74.6%	47 / 63
ironclaw_extractors	74.72%	538 / 720
ironclaw_capabilities	74.95%	2882 / 3845
ironclaw_projects	76.48%	400 / 523
ironclaw_mcp	76.6%	779 / 1017
ironclaw_filesystem	77.32%	5972 / 7724
ironclaw_reborn_cli	77.89%	10795 / 13860
ironclaw_wasm	79.72%	735 / 922
ironclaw_llm	80.83%	23324 / 28854
ironclaw_memory_native	81.02%	3299 / 4072
ironclaw_auth	81.88%	6679 / 8157
ironclaw_first_party_extensions	82.38%	6682 / 8111
ironclaw_host_api	83.68%	9728 / 11625
ironclaw_events	83.8%	1536 / 1833
ironclaw_reborn_identity	83.8%	450 / 537
ironclaw_secrets	84.53%	2797 / 3309
ironclaw_skills	84.73%	4493 / 5303
ironclaw_network	85.09%	959 / 1127
ironclaw_extension_host	85.2%	21115 / 24783
ironclaw_reborn_config	85.23%	2101 / 2465
ironclaw_operator	85.26%	5276 / 6188
ironclaw_telegram_extension	85.4%	1299 / 1521
ironclaw_approvals	86.08%	1818 / 2112
ironclaw_triggers	86.11%	2803 / 3255
ironclaw_reborn_composition	86.17%	22072 / 25613
ironclaw_turns	86.24%	9522 / 11041
ironclaw_webui	86.37%	11171 / 12934
ironclaw_hooks	86.73%	9950 / 11473
ironclaw_runner	86.87%	14674 / 16892
ironclaw_common	86.91%	2244 / 2582
ironclaw_reborn_event_store	87.19%	1327 / 1522
ironclaw_host_ingress	87.42%	528 / 604
ironclaw_product	87.49%	21354 / 24406
ironclaw_extensions	87.71%	4810 / 5484
ironclaw_reborn_openai_compat	88%	3724 / 4232
ironclaw_processes	88.07%	5839 / 6630
ironclaw_reborn_traces	88.15%	11738 / 13316
ironclaw_threads	88.57%	4943 / 5581
ironclaw_host_runtime	89.1%	20638 / 23163
ironclaw_slack_extension	89.26%	2027 / 2271
ironclaw_conversations	90.03%	3171 / 3522
ironclaw_resources	90.84%	4474 / 4925
ironclaw_loop_host	90.93%	17742 / 19512
ironclaw_event_streams	91.24%	1063 / 1165
ironclaw_attachments	93.06%	630 / 677
ironclaw_outbound	93.91%	4101 / 4367
ironclaw_agent_loop	94.42%	10424 / 11040
ironclaw_safety	95.22%	3941 / 4139
ironclaw_first_party_extension_ports	95.71%	3837 / 4009
ironclaw_runtime_policy	96.56%	814 / 843

This table itself is informational and never gates the PR on its own — not the percentage, not the per-crate holes, not the 0-coverage callout. A separate coverage ratchet (dry-run until enforce=true; see tests/integration/coverage-floor.toml) can fail the build on specific configured floors.

Exemptions (3 entry/entries excluded from the accounting above)

Module / Crate	Reason	Issue
crate: ironclaw_embeddings	v1-only: consumed only by root ironclaw (src/app.rs, src/tools/builtin/memory.rs, src/workspace/mod.rs, src/config/{mod,embeddings}.rs); no crates/* dependents. Covered by "Tests (Legacy)".	#5657
crate: ironclaw_gateway	v1-only: consumed only by root ironclaw (src/channels/web/platform/static_files.rs, src/channels/web/handlers/frontend.rs); no crates/* dependents. Covered by "Tests (Legacy)".	#5657
crate: ironclaw_tui	v1-only: consumed only by root ironclaw (src/main.rs, src/channels/tui.rs); no crates/* dependents. Crate's own doc comment confirms it bridges INTO v1, not Reborn. Covered by "Tests (Legacy)".	#5657