rpe-synthesizer: Known Failure Modes

Component: rpe-synthesizer Tags: rpe-synthesizer,engagement,observe-gate,llm Author: phase-f-migration Updated: 4/26/2026, 3:47:42 PM

rpe-synthesizer receives all 5 analysis results from rpe-context-assembler and synthesizes the final engagement recommendation (respond/observe).

FAILURE MODES:

1. llm-gateway unreachable — synthesis cannot complete. rpe-context-assembler receives an error and cannot make the observe/respond decision. All messages with rpe-synthesizer as a gap will show no observe-gate decision.

2. LLM timeout (10s) — synthesis is a single LLM call. Slow inference blocks the response decision.

3. Ambiguous synthesis output — LLM returns a response that does not clearly map to respond/observe. rpe-context-assembler may default to observe. Check synthesizer response schema and template.

4. All analysis input missing or empty — if all 5 analysis services failed, synthesizer receives empty/error inputs. Synthesis result will have low confidence or default to observe.

FIRST CHECKS:

DEPLOY TYPE: image-copy. Requires rebuild + up -d.