feat: specify confidence gate parsing and mini-Explorer spawning in run skill

skills/run/SKILL.md

@@ -126,17 +126,78 @@ After Creator returns:
 
 #### 1c. Confidence Gate (Adaptation Rule A3)
 
-Read Creator's confidence scores from `plan-creator.md`. Apply A3 per `archeflow:orchestration`:
-- Task understanding < 0.5 → **Pause**, ask user
-- Solution completeness < 0.5 → **Upgrade** to standard, spawn Explorer
-- Risk coverage < 0.5 → **Spawn mini-Explorer** for risky area (parallel, 5 min max)
+**Parsing instructions:**
+
+Read `plan-creator.md`, locate the `### Confidence` table. Extract scores for each axis as floats:
+
+```bash
+CONF_FILE=".archeflow/artifacts/${RUN_ID}/plan-creator.md"
+
+# Extract confidence scores (expects format: "| Task understanding | 0.8 |")
+TASK_UNDERSTANDING=$(grep -i "task understanding" "$CONF_FILE" | grep -oE '[0-9]+\.[0-9]+' | head -1)
+SOLUTION_COMPLETENESS=$(grep -i "solution completeness" "$CONF_FILE" | grep -oE '[0-9]+\.[0-9]+' | head -1)
+RISK_COVERAGE=$(grep -i "risk coverage" "$CONF_FILE" | grep -oE '[0-9]+\.[0-9]+' | head -1)
+
+# Fallback: if unparseable, treat as 0.7 (safe default — proceed but not overconfident)
+TASK_UNDERSTANDING="${TASK_UNDERSTANDING:-0.7}"
+SOLUTION_COMPLETENESS="${SOLUTION_COMPLETENESS:-0.7}"
+RISK_COVERAGE="${RISK_COVERAGE:-0.7}"
+```
+
+**Pause branch** (Task understanding < 0.5):
+
+The Creator does not sufficiently understand the task. Do not spawn Maker.
+
+1. Emit decision event with `"chosen":"pause"`
+2. Display message to user: "Creator rated task understanding at <score>. Clarification needed before proceeding."
+3. Block until the user provides clarification
+4. Re-run Creator with the clarification appended to the task description
 
-If A3 triggers, emit a `decision` event:
 ```bash
 ./lib/archeflow-event.sh "$RUN_ID" decision plan "" \
-  '{"what":"confidence_gate","chosen":"<action>","rationale":"<axis> scored <score>"}' "$SEQ_CREATOR_COMPLETE"
+  '{"what":"confidence_gate","chosen":"pause","rationale":"task_understanding scored '"$TASK_UNDERSTANDING"'"}' "$SEQ_CREATOR_COMPLETE"
 ```
 
+**Upgrade branch** (Solution completeness < 0.5):
+
+The Creator's proposal is incomplete — more research is needed.
+
+1. If fast workflow: upgrade to standard, spawn Explorer, then re-run Creator with Explorer output
+2. If already standard/thorough: re-run Explorer with a focused prompt targeting the incomplete areas
+
+```bash
+./lib/archeflow-event.sh "$RUN_ID" decision plan "" \
+  '{"what":"confidence_gate","chosen":"upgrade","rationale":"solution_completeness scored '"$SOLUTION_COMPLETENESS"'"}' "$SEQ_CREATOR_COMPLETE"
+
+# If fast → standard upgrade:
+WORKFLOW="standard"
+# Spawn Explorer, then re-run Creator with Explorer findings
+```
+
+**Mini-Explorer branch** (Risk coverage < 0.5):
+
+The Creator identified risks but lacks confidence in their assessment. Spawn a focused Explorer to investigate.
+
+```
+Agent(
+  description: "Mini-Explorer: investigate risk area for <task>",
+  prompt: "You are the EXPLORER archetype. The Creator rated risk coverage at <score>.
+    Identified risks: <risks from plan-creator.md>
+    Research ONLY the risky areas. Answer: Is the risk real? What mitigations exist? What tests/guards would help?
+    Limit: focused output only.",
+  subagent_type: "Explore"
+)
+```
+
+Save output to `.archeflow/artifacts/${RUN_ID}/plan-mini-explorer.md`. The Maker receives both `plan-creator.md` and `plan-mini-explorer.md` as context.
+
+```bash
+./lib/archeflow-event.sh "$RUN_ID" decision plan "" \
+  '{"what":"confidence_gate","chosen":"mini_explorer","rationale":"risk_coverage scored '"$RISK_COVERAGE"'"}' "$SEQ_CREATOR_COMPLETE"
+```
+
+**Note:** The mini-Explorer runs in parallel with Do phase preparation (5 min max). The Maker can proceed once both `plan-creator.md` and `plan-mini-explorer.md` are available.
+
 #### 1d. Phase Transition: Plan to Do
 
 ```bash