# Explainer Representation K001 Current Handoff

Status: `FROZEN_READY_FOR_IMMEDIATE_CODEX_AFTER_LIVE_PREFLIGHT`

Task: `diagnose-and-improve-hadd-position-representation-v1`

Normative protocol:
`milestones/explainer-representation-k001/prompts/002-diagnose-and-improve-hadd-position-representation-v1.md`

Implementation:
`backgammonsimplified/backgammon-explainer@research/explainer-representation-k001`

Starting head:
`58522bb078ecda273a11476c60f1875a2255b285`

Accepted product architecture remains fixed during research:
`ridge-ranking-hadd-value-explanation-sidecar-v1`.

Accepted integration package identity:
`f40ba9417896383a94e48012843eb0f45e177430e746cd01080f8243c5751424`.

Initial host: `corn-syrup`.
One coordinator, one Codex maximum, one writable branch/worktree, one runtime root and one artifact root. Fresh CPU/RAM/disk/process preflight is mandatory before every substantial run. Heavy compute must be niced.

Generation 1 is the frozen P3 family ablation plus residual-class diagnosis. No feature additions may be invented within that run. After its result is durable, the coordinator may freeze the next bounded representation experiment and immediately continue without operator confirmation.

No new GNU/Sage/matches/labels/generic 0-ply, no Sage/GNU campaign training consumption, no production promotion, Analyzer mutation, Canonical mutation or Corpus mutation. Protected evaluation is not permitted in Generation 1. Any improved model is only `CANDIDATE_FOR_FUTURE_INDEPENDENT_MODEL_SELECTION`.