chore(life): bump aiOS for BRO-423 loop detection

[broomva]

Summary

• update the aiOS submodule pointer to include the BRO-423 loop detection middleware implementation
• align the Life workspace with broomva/aiOS#5

Validation

• cargo fmt --all
• cargo clippy --workspace -- -D warnings
• cargo test --workspace

Depends on: broomva/aiOS#5
Linear: BRO-423

Summary by CodeRabbit

• Chores
  • Updated internal dependencies to latest versions. No user-facing changes or interface modifications.

[linear]

BRO-423 Three-Tier Loop Detection Middleware

What

Implement a LoopDetectionMiddleware for the turn middleware chain that detects and halts runaway tool-calling loops. Uses MD5/Blake3 hashing of normalized, sorted tool call signatures with a sliding window.

Three graduated responses:

1. Warning (threshold=3 repetitions): Inject a message telling the agent to stop repeating
2. Hard stop (limit=5): Strip all tool_calls from the response, forcing text-only output
3. Per-session tracking with configurable window size (default: 20 turns)

Why

Runaway tool-calling loops waste tokens and time. Life currently has no loop detection. Autonomic's homeostasis could theoretically detect this but lacks the granularity for per-turn tool call patterns. This is a low-effort, high-safety improvement.

Implementation

Target crate: arcan-core (as a TurnMiddleware impl)

• Hash tool call signatures (name + normalized args) per turn using Blake3 (already in workspace)
• Sliding window of last N turn hashes
• Compare current hash against window; count consecutive matches
• At warning threshold: inject system message
• At hard stop: filter tool calls from LLM response
• Log loop events to Lago for post-mortem analysis
• Configurable thresholds via LoopDetectionConfig

Acceptance Criteria

• LoopDetectionMiddleware implements TurnMiddleware
• Blake3 hashing of normalized tool call signatures
• Warning at configurable threshold (default: 3)
• Hard stop at configurable limit (default: 5)
• Loop events persisted to Lago journal
• Tests: normal flow passes through, repeated calls trigger warning then stop

Source

DeerFlow — Three-tier loop detection (§17 in research doc)

[coderabbitai]

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Free

Run ID: d40270b7-8217-4c91-948b-c35ebd0ad0f7

📥 Commits

Reviewing files that changed from the base of the PR and between 99c54f4 and bfeff88.

📒 Files selected for processing (1)

• aiOS

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📝 Walkthrough

Walkthrough

The aiOS submodule commit pointer was updated to a new version. This represents a version bump of the aiOS dependency without any direct changes to the codebase or public interfaces in this repository.

Changes

Cohort / File(s)	Summary
aiOS Submodule Update aiOS	Updated submodule commit pointer from c8e55cc02cc976fb601ad85f36754b09609e6d44 to 02401908310d7e53d707230faa601d7038ee2f86.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

Poem

🐰 A hop, a skip, aiOS takes flight,
The submodule spins to a shiny new height,
Just pointers and commits in the git-filled night,
One line changed, the dependency's right! ✨

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Note

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