[angel-manuel]

Summary

• Separate the agent's working context from the operator's canonical conversation record
• turn/end.messages deprecated — agents send only usage; operators reconstruct from stream/* notifications
• New context/compacted notification — emitted after auto-compaction with a prose summary and surviving canonical messages for the operator to persist
• Compaction rewritten to return CompactionResult with working_messages (for LLM, includes <compacted_context> system scaffolding) and canonical_messages (for operator, no scaffolding)
• Configurable thresholds via env vars: CONTEXT_WINDOW, COMPACTION_THRESHOLD, COMPACTION_KEEP_RECENT, MAX_COMPACTIONS
• Per-session compaction cap (default 3)
• New design doc: docs/design/context-management.md

Test plan

• Protocol: round-trip fixtures for ContextCompactedParams and usage-only TurnEndParams
• Compaction: tests for CompactionResult structure, canonical-excludes-scaffolding
• ACP client: turn_end sends no messages, context_compacted round-trips correctly
• Server dispatch: context/compacted passes through as notification
• E2e: supervisor pipeline verifies via stream/* frames instead of turn/end.messages
• All 421+ tests pass, clippy clean

🤖 Generated with Claude Code

[sentry]

Codecov Report

❌ Patch coverage is 86.16352% with 22 lines in your changes missing coverage. Please review.
✅ Project coverage is 91.62%. Comparing base (b37cb9e) to head (e687a42).

Files with missing lines	Patch %	Lines
loop/src/agentic_loop.rs	23.52%	13 Missing ⚠️
loop/src/compaction.rs	78.26%	5 Missing ⚠️
loop/src/main.rs	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #47      +/-   ##
==========================================
- Coverage   91.78%   91.62%   -0.17%     
==========================================
  Files          50       50              
  Lines        6857     6949      +92     
==========================================
+ Hits         6294     6367      +73     
- Misses        563      582      +19     

Files with missing lines	Coverage Δ
loop/src/acp.rs	91.60% <100.00%> (+0.48%)	⬆️
loop/src/config.rs	100.00% <100.00%> (ø)
loop/src/observability/langfuse.rs	99.60% <100.00%> (+<0.01%)	⬆️
server/src/tunnel/dispatch.rs	100.00% <100.00%> (ø)
server/src/tunnel/run.rs	65.78% <100.00%> (+0.45%)	⬆️
loop/src/main.rs	0.00% <0.00%> (ø)
loop/src/compaction.rs	96.37% <78.26%> (-1.59%)	⬇️
loop/src/agentic_loop.rs	89.76% <23.52%> (-2.61%)	⬇️

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