[Mathih13]

Fear movement scanned every aura on each creature tick to find the few control auras that cause fear. A composite index on the existing effect-kind and parameter columns now selects those candidates directly. Scope checks, deduplication and the source-caster tie break keep their existing behavior.

This addresses the aura-scan finding in the performance and correctness report.

Verified with 1,470 Module tests in an isolated build, the focused cycle suite, a Wasm check and offline preflight. A plain publish from the baseline to this change on a private in-memory Standalone created only the new index and preserved a distinctive existing row. No row shape, generated binding or backfill changes are needed. This removes unrelated aura reads; it is not a measured realm capacity result.

Implemented by GPT-5.6 Sol through Codex, reviewed by GPT-6 through Codex.

Summary by CodeRabbit

• Performance
  • Improved fear-effect processing by using a targeted index, reducing unnecessary scanning while preserving existing resolution and gameplay behavior.
• Tests
  • Updated validation to confirm fear-effect lookups use the optimized path.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Advanced

Run ID: 4a993bfe-6d8b-4bba-900f-6fcefe4b54e2

📥 Commits

Reviewing files that changed from the base of the PR and between 3850bae and 90e9c7e.

📒 Files selected for processing (3)

• module/src/creatures/cycle/ctx.rs
• module/src/creatures/cycle/harness.rs
• module/src/spell/tables.rs

Included review availability: Your plan provides up to 10 included reviews per hour; 0 remain after this review.

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📝 Walkthrough

Walkthrough

The change adds a game_aura.by_kind_param index and updates fear handling and its production adapter to use indexed aura queries instead of full-table scans.

Changes

Fear aura lookup

Layer / File(s)	Summary
Indexed fear query module/src/spell/tables.rs, module/src/creatures/cycle/ctx.rs, module/src/creatures/cycle/harness.rs	game_aura now exposes a B-tree index on (eff_kind, eff_p0). FearSink::panicked and its adapter expectation use the index to find control/fear auras.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Merge Risk: ⚪ Minimal · up to 90e9c

Fear movement now selects control/fear aura candidates through a composite index rather than scanning all auras, preserving the existing resolution behavior while reducing per-tick work. No current merge-blocking risk remains.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 2 functions across 3 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: using an index to find fear auras for creature processing.
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.

• Fix all pre-merge checks with AI

✨ Finishing Touches 💡 1

📝 Generate docstrings 💡

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch perf/fear-aura-candidates

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