feat: add decision.point event, decision logger, and run replay

- archeflow-decision.sh: convenience wrapper for logging PDCA decision points
- archeflow-replay.sh: timeline view and weighted what-if replay for recorded runs
- archeflow-event.sh: add decision.point usage example
- archeflow-dag.sh: render decision.point events in DAG output

lib/archeflow-dag.sh

@@ -87,6 +87,9 @@ EVENTS_PARSED=$(jq -r '
     elif .type == "agent.complete" then
       (.data.archetype // .agent // "unknown") + " (" + .phase + ")" +
       (if (.data.tokens // 0) > 0 then " [" + (.data.tokens | tostring) + " tok]" else "" end)
+    elif .type == "decision.point" then
+      (.data.archetype // .agent // "?") + " → " + (.data.decision // "?") +
+      " (conf " + ((.data.confidence // 0) | tostring) + ")"
     elif .type == "decision" then
       "decision: " + (.data.what // "unknown") + " → " + (.data.chosen // "unknown")
     elif .type == "phase.transition" then
@@ -209,7 +212,7 @@ render_node() {
   local colored_label
   case "$type" in
     phase.transition) colored_label="${C_TRANS}${label}${C_RESET}" ;;
-    decision)         colored_label="${C_DECISION}${label}${C_RESET}" ;;
+    decision|decision.point) colored_label="${C_DECISION}${label}${C_RESET}" ;;
     review.verdict)   colored_label="${C_VERDICT}${label}${C_RESET}" ;;
     *)                colored_label="${pc}${label}${C_RESET}" ;;
   esac

lib/archeflow-decision.sh

@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+# archeflow-decision.sh — Log a PDCA decision point for run replay / effectiveness analysis.
+#
+# Appends a decision.point event to .archeflow/events/<run_id>.jsonl with:
+#   phase, archetype (agent + data.archetype), input, decision, confidence, ts (via event layer)
+#
+# Usage:
+#   ./lib/archeflow-decision.sh <run_id> <phase> <archetype> '<input>' '<decision>' <confidence> [parent_seq]
+#
+# Examples:
+#   ./lib/archeflow-decision.sh 2026-04-06-auth check guardian \
+#     'diff + proposal risks' 'needs_changes' 0.82 7
+#   ./lib/archeflow-decision.sh 2026-04-06-auth act "" 'route findings' 'send_to_maker' 0.9
+#
+# confidence: 0.0–1.0 (orchestrator-estimated certainty in the recorded choice)
+#
+# Requires: jq (via archeflow-event.sh)
+
+set -euo pipefail
+
+LIB_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+if [[ $# -lt 6 ]]; then
+  echo "Usage: $0 <run_id> <phase> <archetype> '<input>' '<decision>' <confidence> [parent_seq]" >&2
+  exit 1
+fi
+
+RUN_ID="$1"
+PHASE="$2"
+ARCH="$3"
+INPUT="$4"
+DECISION="$5"
+CONF_RAW="$6"
+PARENT="${7:-}"
+
+if ! [[ "$CONF_RAW" =~ ^[0-9]*\.?[0-9]+$ ]]; then
+  echo "Error: confidence must be a number (e.g. 0.85)" >&2
+  exit 1
+fi
+
+DATA=$(jq -cn \
+  --arg a "$ARCH" \
+  --arg i "$INPUT" \
+  --arg d "$DECISION" \
+  --argjson c "$CONF_RAW" \
+  '{archetype:$a, input:$i, decision:$d, confidence:$c}')
+
+exec "$LIB_DIR/archeflow-event.sh" "$RUN_ID" decision.point "$PHASE" "$ARCH" "$DATA" "$PARENT"

lib/archeflow-event.sh

@@ -8,6 +8,9 @@
 #   ./lib/archeflow-event.sh 2026-04-03-der-huster agent.complete plan creator '{"duration_ms":167522}' 2
 #   ./lib/archeflow-event.sh 2026-04-03-der-huster phase.transition do "" '{"from":"plan","to":"do"}' 3,4
 #   ./lib/archeflow-event.sh 2026-04-03-der-huster fix.applied act "" '{"source":"guardian"}' 8
+#   ./lib/archeflow-event.sh 2026-04-03-der-huster decision.point check guardian \
+#     '{"archetype":"guardian","input":"diff","decision":"needs_changes","confidence":0.85}' 7
+#   # Or use: ./lib/archeflow-decision.sh <run_id> <phase> <arch> '<input>' '<decision>' <confidence> [parent]
 #
 # Parent seqs: comma-separated seq numbers of causal parent events (DAG).
 #   "2"   → single parent [2]

lib/archeflow-replay.sh

@@ -0,0 +1,228 @@
+#!/usr/bin/env bash
+# archeflow-replay.sh — Inspect recorded runs: decision timeline and weighted what-if replay.
+#
+# Usage:
+#   archeflow-replay.sh timeline <run_id>
+#   archeflow-replay.sh whatif <run_id> [--weights arch=w,arch2=w2] [--threshold 0.5] [--json]
+#   archeflow-replay.sh compare <run_id> [--weights ...] [--threshold ...] [--json]
+#
+# Events file: .archeflow/events/<run_id>.jsonl (relative to current working directory)
+#
+# whatif / compare:
+#   - Loads check-phase review.verdict events (last verdict per archetype).
+#   - Original gate (strict): BLOCK if any reviewer is not approved.
+#   - Replay gate (weighted): BLOCK if sum(weight * strict) / sum(weight) >= threshold,
+#     where strict=1 for non-approved verdicts, else 0. Default weight per archetype is 1.0.
+#
+# Requires: jq
+
+set -euo pipefail
+
+if [[ $# -lt 2 ]]; then
+  echo "Usage: $0 {timeline|whatif|compare} <run_id> [options]" >&2
+  echo "" >&2
+  echo "  timeline <run_id>              Decision timeline (decision.point + review.verdict)" >&2
+  echo "  whatif <run_id> [--weights k=v,...] [--threshold 0.5] [--json]" >&2
+  echo "  compare <run_id>  (timeline + whatif summary)" >&2
+  exit 1
+fi
+
+COMMAND="$1"
+RUN_ID="$2"
+shift 2
+
+if ! command -v jq &>/dev/null; then
+  echo "Error: jq is required." >&2
+  exit 1
+fi
+
+EVENT_FILE=".archeflow/events/${RUN_ID}.jsonl"
+
+resolve_event_file() {
+  if [[ ! -f "$EVENT_FILE" ]]; then
+    echo "Error: event file not found: $EVENT_FILE" >&2
+    exit 1
+  fi
+}
+
+cmd_timeline() {
+  resolve_event_file
+  echo "## Decision timeline — run_id=${RUN_ID}"
+  echo ""
+  local cnt
+  cnt=$(jq -s '[.[] | select(.type == "decision.point")] | length' "$EVENT_FILE")
+  if [[ "$cnt" -gt 0 ]]; then
+    echo "### decision.point (${cnt})"
+    jq -r 'select(.type == "decision.point")
+      | "- \(.ts)  [\(.phase)] \(.data.archetype // .agent // "?")  \(.data.decision)  conf=\(.data.confidence // "n/a")  input=\(.data.input // "")"' \
+      "$EVENT_FILE"
+    echo ""
+  else
+    echo "### decision.point"
+    echo "(none — emit with ./lib/archeflow-decision.sh during the run)"
+    echo ""
+  fi
+
+  echo "### review.verdict (check phase)"
+  if jq -e -s '[.[] | select(.type == "review.verdict" and .phase == "check")] | length > 0' "$EVENT_FILE" >/dev/null 2>&1; then
+    jq -r 'select(.type == "review.verdict" and .phase == "check")
+      | "- \(.ts)  \(.data.archetype // .agent // "?")  verdict=\(.data.verdict)  findings=\((.data.findings // []) | length)"' \
+      "$EVENT_FILE"
+  else
+    echo "(none)"
+  fi
+  echo ""
+}
+
+parse_weights_to_json() {
+  local raw="${1:-}"
+  local obj='{}'
+  if [[ -z "$raw" ]]; then
+    echo '{}'
+    return
+  fi
+  IFS=',' read -ra pairs <<< "$raw"
+  for pair in "${pairs[@]}"; do
+    [[ -z "$pair" ]] && continue
+    local k="${pair%%=*}"
+    local v="${pair#*=}"
+    k=$(echo "$k" | tr '[:upper:]' '[:lower:]' | xargs)
+    v=$(echo "$v" | xargs)
+    if [[ -z "$k" || "$k" == "$pair" ]]; then
+      echo "Error: invalid weight entry (use arch=1.5): $pair" >&2
+      exit 1
+    fi
+    obj=$(echo "$obj" | jq --arg k "$k" --argjson v "$v" '. + {($k): $v}')
+  done
+  echo "$obj"
+}
+
+cmd_whatif() {
+  local weights_str=""
+  local threshold="0.5"
+  local json_out="false"
+  while [[ $# -gt 0 ]]; do
+    case "$1" in
+      --weights)
+        weights_str="$2"
+        shift 2
+        ;;
+      --threshold)
+        threshold="$2"
+        shift 2
+        ;;
+      --json)
+        json_out="true"
+        shift
+        ;;
+      *)
+        echo "Unknown option: $1" >&2
+        exit 1
+        ;;
+    esac
+  done
+
+  resolve_event_file
+  local weights_json
+  weights_json="$(parse_weights_to_json "$weights_str")"
+
+  local result
+  result=$(jq -s --argjson weights "$weights_json" --argjson thr "$threshold" --arg run_id "$RUN_ID" '
+    def strict($v):
+      if $v == null then 1
+      else ($v | ascii_downcase) as $lv
+      | if ($lv == "approved" or $lv == "approve") then 0 else 1 end
+      end;
+
+    def norm_key: ascii_downcase;
+
+    ([.[] | select(.type == "review.verdict" and .phase == "check")]
+      | sort_by(.seq)
+      | reduce .[] as $e ({}; . + { (($e.data.archetype // $e.agent // "unknown") | norm_key): $e })
+    ) as $last |
+
+    ($last | keys) as $keys |
+    if ($keys | length) == 0 then
+      {
+        run_id: $run_id,
+        error: "no check-phase review.verdict events; nothing to simulate"
+      }
+    else
+      [ $keys[] as $k | $last[$k] as $ev |
+        ($weights[($k | norm_key)] // 1.0) as $w
+        | strict($ev.data.verdict) as $s
+        | {
+            archetype: ($ev.data.archetype // $ev.agent // $k),
+            verdict: ($ev.data.verdict // "unknown"),
+            weight: $w,
+            strict: $s,
+            weighted_contrib: ($w * $s)
+          }
+      ] as $rows |
+      ($rows | map(.weighted_contrib) | add) as $num |
+      ($rows | map(.weight) | add) as $den |
+      (if $den > 0 then ($num / $den) else 0 end) as $ratio |
+      (if ($rows | map(.strict) | max) == 1 then "BLOCK" else "SHIP" end) as $strict_out |
+      (if $ratio >= $thr then "BLOCK" else "SHIP" end) as $replay_out |
+      {
+        run_id: $run_id,
+        threshold: $thr,
+        weights_used: $weights,
+        strict_any_veto: {
+          outcome: $strict_out,
+          description: "BLOCK if any reviewer verdict is not approved"
+        },
+        weighted_replay: {
+          weighted_strictness: ($ratio * 1000 | round / 1000),
+          outcome: $replay_out,
+          description: ("BLOCK if weighted strictness >= " + ($thr | tostring))
+        },
+        reviewers: $rows
+      }
+    end
+  ' "$EVENT_FILE")
+
+  if [[ "$json_out" == "true" ]]; then
+    echo "$result"
+  else
+    echo "$result" | jq -r '
+      if .error then "Error: \(.error)" else
+        "# What-if replay — run_id=\(.run_id)\n",
+        "",
+        "## Outcomes",
+        "| Model | Result |",
+        "|-------|--------|",
+        "| Original (any non-approve → BLOCK) | \(.strict_any_veto.outcome) |",
+        "| Weighted replay (threshold=\(.threshold)) | \(.weighted_replay.outcome) |",
+        "",
+        "## Weighted strictness",
+        "\(.weighted_replay.weighted_strictness)  (0 = all approved, 1 = all blocking)",
+        "",
+        "## Per reviewer",
+        "| Archetype | Verdict | Weight | Strict | w×strict |",
+        "|-----------|---------|--------|--------|----------|",
+        (.reviewers[] | "| \(.archetype) | \(.verdict) | \(.weight) | \(.strict) | \(.weighted_contrib) |"),
+        "",
+        (if (.weights_used | length) > 0 then
+          "## Custom weights applied\n" + (.weights_used | to_entries | map("- \(.key): \(.value)") | join("\n")) + "\n"
+        else empty end)
+      end
+    '
+  fi
+}
+
+cmd_compare() {
+  cmd_timeline
+  echo ""
+  cmd_whatif "$@"
+}
+
+case "$COMMAND" in
+  timeline) cmd_timeline ;;
+  whatif)   cmd_whatif "$@" ;;
+  compare)  cmd_compare "$@" ;;
+  *)
+    echo "Unknown command: $COMMAND" >&2
+    exit 1
+    ;;
+esac