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Live CortexAgent Hippocampus Prefix Validation — 2026-06-27

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Primary source. This is the verbatim Oczy document. The analytical field notes on the research page interpret and summarize these sources.

Live CortexAgent Hippocampus Prefix Validation — 2026-06-27

Question

Does the live CortexAgent.use_hippocampus_prefix path actually generate a useful ReservedPosition during articulate() and produce exact-token recall in a real multi-fact turn?

Method

Added --use-agent-prefix to src/oczy/experiments/multi_fact_stressor.py. When this flag is set:

  1. The stressor enables agent.config.use_hippocampus_prefix = True.
  2. _recall_fact() now passes recall_query=query to agent.articulate(), so the agent has a query to drive hippocampal replay.
  3. The stressor wraps agent.set_reserved_position() to capture the source of any ReservedPosition the live agent sets (because articulate() clears it in finally).

Ran real-driver scalar and hybrid with --auto-consolidate --hybrid-cap 0 --use-agent-prefix --length 512.

Results

mode prefix_source recall_a recall_b co_recall consolidation_strength
scalar hippocampus 1 1 1/1 10.0
hybrid hippocampus 1 1 1/1 35.99

Both configurations reach exact-token co_recall via a prefix generated by the live CortexAgent, not by the stressor wrapper.

Interpretation

  • The closed loop works end-to-end:
    • perceive long turn → hippocampus stores high-surprise traces
    • consolidate → traces remain available
    • articulate with recall_query → agent replays relevant traces
    • derive ReservedPosition from replay → apply as reserved-position prefix
    • exact-token recall achieved.
  • The stressor wrapper's own _derive_prefix_from_hippocampus is no longer required when --use-agent-prefix is active; the agent handles it.
  • Scalar and hybrid are indistinguishable at this probe resolution.

Limitations

  • Hippocampus keyword extraction still relies on query tokens and content words; it has not been tested on out-of-vocabulary or paraphrased queries.
  • --use-agent-prefix is a stressor flag; production use requires enabling CortexAgentConfig.use_hippocampus_prefix directly.
  • No comparison was made to the hand-coded prefix path in the same run, but earlier runs show it also reaches co_recall=1/1.

Next steps

  1. Remove or deprecate the stressor-only --auto-prefix now that --use-agent-prefix validates the agent path.
  2. Generalize keyword extraction with explicit expected targets from a knowledge store.
  3. Measure IdentityHypernetwork adapter effects on the same probe.

Artifacts

  • src/oczy/experiments/multi_fact_stressor.py
  • src/oczy/experiments/tests/test_multi_fact_stressor.py

Commits

  • e580526 — Add --use-agent-prefix.
  • ab1134a — Update SUMMARY.md with run #98 result.

Run

Run #98: benchmark code_qa_accuracy=1.0, fast suite 310 passed.