feat: add strategy abstraction with pdca and pipeline strategies

skills/run/SKILL.md

@@ -63,7 +63,38 @@ After emitting `run.start`, record `SEQ_RUN_START=1`.
 
 If `--start-from` is specified, verify that the required prior artifacts exist in `.archeflow/artifacts/${RUN_ID}/` before skipping phases. If missing, abort with an error.
 
-#### 0a. Lib Script Validation
+#### 0a. Strategy Resolution
+
+Determine the execution strategy before proceeding. Strategy controls the overall flow shape (cyclic vs linear).
+
+```bash
+# Read strategy from config or CLI flag
+STRATEGY=$(grep '^strategy:' "$CONFIG" 2>/dev/null | sed 's/strategy:\s*//' | tr -d '"' | head -1)
+STRATEGY="${STRATEGY:-auto}"
+
+# CLI override: --strategy pdca|pipeline
+# (parsed from invocation args, overrides config)
+
+# Auto-select logic
+if [[ "$STRATEGY" == "auto" ]]; then
+  TASK_LOWER=$(echo "$TASK" | tr '[:upper:]' '[:lower:]')
+  if echo "$TASK_LOWER" | grep -qE '(fix|bug|patch|hotfix)'; then
+    STRATEGY="pipeline"
+  elif echo "$TASK_LOWER" | grep -qE '(refactor|redesign|review)'; then
+    STRATEGY="pdca"
+  elif [[ "$WORKFLOW" == "thorough" ]]; then
+    STRATEGY="pdca"
+  else
+    STRATEGY="pdca"
+  fi
+fi
+
+echo "Strategy: $STRATEGY"
+```
+
+**Strategy dispatch:** If `STRATEGY=pdca`, execute Steps 1-5 below (existing PDCA flow). If `STRATEGY=pipeline`, skip to the "Pipeline Strategy Execution" section at the end of this skill.
+
+#### 0b. Lib Script Validation
 
 Verify that all required library scripts exist and are executable before proceeding. Fail fast if any dependency is missing.
 
@@ -102,7 +133,7 @@ if ! command -v jq &>/dev/null; then
 fi
 ```
 
-#### 0b. Memory Injection
+#### 0c. Memory Injection
 
 Load cross-run memory lessons and inject into agent prompts. Use `--audit` to track which lessons were injected for this run:
 
@@ -121,7 +152,7 @@ ${MEMORY_LESSONS}"
 fi
 ```
 
-#### 0c. Model Configuration
+#### 0d. Model Configuration
 
 Read model assignment from `.archeflow/config.yaml` and resolve the model for each archetype based on the current workflow. Per-workflow overrides take precedence over per-archetype overrides, which take precedence over the default.
 
@@ -740,3 +771,74 @@ Run ID: <run_id> | Workflow: <standard> | Cycle: 1/<max>
 Artifacts: .archeflow/artifacts/<run_id>/
 Report: .archeflow/events/<run_id>.jsonl
 ```
+
+---
+
+## Pipeline Strategy Execution
+
+When `STRATEGY=pipeline`, execute this linear flow instead of the PDCA cycle above.
+
+### Pipeline Phases
+
+```
+Plan -> Implement -> Spec-Review -> Quality-Review -> Verify
+```
+
+No cycle-back. Each phase runs once.
+
+### 1. Plan
+
+Spawn Creator only (no Explorer). Use fast-workflow Creator prompt with Mini-Reflect.
+
+Save output to `.archeflow/artifacts/${RUN_ID}/plan-creator.md`.
+
+### 2. Implement
+
+Spawn Maker in isolated worktree with Creator's proposal.
+
+Save output to `.archeflow/artifacts/${RUN_ID}/do-maker.md`.
+
+### 3. Spec-Review
+
+Run Guardian and Skeptic **sequentially** (Guardian first, then Skeptic only if Guardian has findings).
+
+- Guardian receives: Maker's git diff + proposal risk section
+- Skeptic receives: Creator's proposal (assumptions focus)
+
+Save to `check-guardian.md` and `check-skeptic.md`.
+
+### 4. Quality-Review
+
+Spawn Sage with proposal + diff + implementation summary.
+
+Save to `check-sage.md`.
+
+### 5. Verify
+
+Run the project's test suite. If tests pass and no CRITICAL findings exist:
+
+1. Merge the Maker's branch
+2. Emit `run.complete`
+
+If CRITICAL findings exist:
+
+1. Spawn Maker for a **single targeted fix** — provide only the CRITICAL findings as context
+2. Re-run tests
+3. If still failing, report to user (do not cycle back)
+
+WARNINGs are logged in the run event but do not block the merge.
+
+### Pipeline Progress Display
+
+```
+━━━ ArcheFlow Pipeline: <task> ━━━━━━━━━━━━━━━━
+Run ID: <run_id> | Strategy: pipeline
+
+[Plan]     Creator designing...          -> done (20s)
+[Implement] Maker building...            -> done (60s, 3 files)
+[Spec]     Guardian reviewing...         -> APPROVED
+[Quality]  Sage reviewing...             -> APPROVED (1 WARNING)
+[Verify]   Tests passing...              -> merged to main
+
+━━━ Complete: 2m 15s ━━━━━━━━━━━━━━━━━━━━━━━━━━
+```