fix(ci): select static-abi in pr-draft when its matrix consumers are planned

[ndizazzo]

What

pr-draft's control_slices in ci/slices.yml omitted static-abi, unlike
pr-ready/main/manual-full. One-line fix:

- "control_slices": ["quality", "runner-contract"],
+ "control_slices": ["quality", "runner-contract", "static-abi"],

Why

static_abi is the only Linux-lane job gated on required_slices while its
consumers (rust_tests, kotlin_sdk_input) are gated on the matrices that
force_all_rows populates for control-plane changes. Any pr-draft PR that
touches only ci-control-domain files (any workflow/scripts edit) triggers
force_all_rows, which force-includes the full sdk matrix including
kotlin — but static-abi was never selected, so static_abi skips,
kotlin_sdk_input's needs: [static_abi] guard then also skips it, and
validate-ci-lane-results.py fails the lane because the sdk matrix still
expects kotlin_sdk_input to succeed:

ERROR: planned job 'kotlin_sdk_input' finished with 'skipped'

This breaks the fail-open invariant documented in ci/ci.md:182-184:
control-plane changes are supposed to land on "a successful required slice
instead of an empty reusable workflow reported as skipped." rust_tests
doesn't hit this because its matrix is already slice-gated
(plan-ci.py:822); the row matrices (sdk, runtime, smoke) never got the
same guard, and static-abi's absence from pr-draft is where that surfaces.

Testing

• New regression test test_control_plane_changes_select_static_abi_for_its_matrix_gated_consumers
  in scripts/tests/test_plan_ci.py, encoding the general invariant: for any
  profile, if matrices.sdk contains kotlin or matrices.rust_tests is
  non-empty, static-abi must be in required_slices. Subtested over
  pr-draft/pr-ready/main/manual-full x a ci-control change.
  Confirmed it fails on pr-draft only before this change, passes on all
  four after.
• Re-ran the original repro:
  echo '{"profile":"pr-draft",...,"changed_files":[".github/workflows/ci-linux-lane.yml"]}' | python3 scripts/plan-ci.py
  — required_slices now includes static-abi, matrices.rust_tests stays
  [] (correctly still unselected).
• Full python3 -m unittest scripts.tests.test_plan_ci — 24/24 pass.

Scope note

Opened standalone against main, not folded into #1380 (the PR whose red
"PR / Linux" check surfaced this): pr_linux.yml's plan job checks out
ref: ${{ github.event.repository.default_branch }}, so plan-ci.py and
ci/slices.yml are read from main, not the PR head — a fix living inside
#1380 would have zero effect on #1380's own CI. Opened ready, not draft:
under pr-draft this same PR's own diff (ci/slices.yml + tooling domain)
would reproduce the bug it fixes against a main that doesn't have the fix
yet, with no way to clear it.

Follow-ups intentionally deferred (see mesh-dev channel thread for the full
design discussion): the structural fix moving static_abi's gate onto the
matrix vocabulary, the undeclared sdk -> static-abi dependency edge in
ci/slices.yml, and force_all_rows bypassing pr-draft's smoke-row
pruning.

Related to #1380.

🤖 Generated with Claude Code

Summary by CodeRabbit

• New Features

  • Added static ABI validation to pull request draft checks alongside existing quality and runner-contract checks.

• Tests

  • Expanded CI plan regression coverage to verify static ABI validation is selected across tested profiles.
  • Retained checks for conditional Kotlin and Rust consumer coverage in applicable test plans.

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---

📝 Walkthrough

Walkthrough

The pr-draft CI profile now includes static-abi. Regression coverage asserts its selection for every tested profile and retains conditional Kotlin or Rust consumer checks.

Changes

CI control slice planning

Layer / File(s)	Summary
Static ABI profile and regression coverage ci/slices.yml, scripts/tests/test_plan_ci.py	The pr-draft profile adds static-abi. The control-plane test asserts its selection for every tested profile and retains conditional Kotlin or Rust consumer validation.

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

Merge Risk: ⚪ Minimal · up to 591d5

This localized CI configuration change ensures the required static-ABI slice is selected for affected matrix consumers, with regression coverage reported as passing; no actionable merge-blocking risk remains beyond normal checks and review.

Suggested reviewers: i386

🚥 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 clearly identifies the CI fix that adds static-abi to pr-draft when its matrix consumers are planned.
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.

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Actionable comments posted: 1

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Inline comments:
In `@scripts/tests/test_plan_ci.py`:
- Around line 278-283: Move the general static-abi assertion outside the
kotlin_planned/rust_tests_planned conditional so every profile, including
pr-draft, must include "static-abi" in plan["required_slices"]. Keep the
conditional assertion only for the consumer-specific invariant.

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Configuration used: Organization UI

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📒 Files selected for processing (2)

• ci/slices.yml
• scripts/tests/test_plan_ci.py

Included review availability: Your plan provides up to 8 included reviews per hour; 4 remain after this review.