52 lines
2.3 KiB
Markdown
52 lines
2.3 KiB
Markdown
# Model gate — reflection requires a big model (BLOCKING)
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Shared include. Runs FIRST in any orchestrator whose reflection —
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brainstorming, planning, contract, audit judgment, loop decisions —
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executes inline or in inherit-model subagents. Sonnet-pinned executors are
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not what this gate protects; it protects the thinking around them (BDR-066).
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## 1. Self-check
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Your system prompt names the model powering this session. Fable or Opus →
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big. Sonnet, Haiku, anything else → small.
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## 2. Witness — deterministic check
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bash "$HOME/.claude/lib/model-check.sh"
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Output `<class>:<raw>`; exit 0 = big, 2 = small, 3 = unknown. The witness
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reads the PERSISTED model (settings.json — the file `/model` rewrites,
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LRN-098). It can lag reality (session launched with `--model`, settings not
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yet rewritten) — that is why the self-check exists alongside it.
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## 3. Verdict
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| self-check | witness | action |
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|---|---|---|
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| big | big (0) | proceed, SILENT — the nominal path prints nothing |
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| small | any | **STOP** |
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| big | small (2) | disagreement — **STOP**, surface BOTH values; the user confirms or relaunches |
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| big | unknown (3) | fail-visible: print `model gate: witness unknown (<raw>) — self-check says <model>` and ask the user to confirm before continuing (BDR-025: unknown never silently passes) |
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**STOP means**: print exactly
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⛔ MODEL GATE — session on <model>. Reflection steps of this skill
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require Fable or Opus. Switch with /model, then relaunch the skill.
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then end the turn. No later step runs, no agent is dispatched, nothing is
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edited.
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## 4. Dispatch tiers (BDR-077 — no inherit)
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The gate guards the MAIN loop only. Dispatched work NEVER inherits the
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session model: typed agents run on their frontmatter pin; built-ins
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(general-purpose / Explore / Plan) carry an explicit `model=` at every call
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site — `model: "fable"` when the child performs reflection/orchestration on
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the main loop's behalf (skill-runners), otherwise its complexity tier
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(opus = dispatched judgment, sonnet = execution/collection, haiku = short
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mechanical probes).
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Effort is the second axis of the same table (BDR-107): every typed agent
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carries an `effort:` pin next to `model:`, and the main loop shifts per phase
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through `lib/effort-shift.md`. Nothing dispatched inherits either axis.
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