feat(nudge): ReContext-grounded cue reactivation + analyst refinements

Analyse claude-adam through ReContext (arXiv:2607.02509): close the
access!=utilization gap with query-conditioned nudge replay + analyst tweaks.

- nudge: optional cue.cwd gates SessionStart replay (adam-nudge.mjs) and
  new mid-session reactivation on UserPromptSubmit (adam-observe.mjs,
  cwd-gated, once/session, ADAM_NO_MIDSESSION_NUDGE opt-out).
- new adam-apply-nudge.mjs builds message + cue deterministically from
  proposal frontmatter (wired into SKILL.md, install.sh, pending-check).
- adam-batch: optional --max-batches/--top-fraction output cap (default off),
  reports capped.
- analyst: utility-lift rubric penalty + skill_utility_path fed to both
  stages; adaptive re-diagnose for unclear/top-severity clusters;
  cross-type associative pass (agents/adam.md, SKILL.md).
- tests: 140 -> 144 (cue gate, batch cap, apply-nudge, mid-session).

hooks/adam-observe.mjs

@@ -289,6 +289,37 @@ function errorFingerprint(toolResponse) {
   if (!normalized) return null;
   return `raw:${djb2(normalized)}`;
 }
+// Mid-session nudge reactivation (ReContext P5/P7): on UserPromptSubmit, surface a
+// stored active-nudge whose `cue.cwd` matches the current directory, so a deferred
+// reminder lands when the user is actually working in that project instead of only
+// at SessionStart. Read-only — SessionStart (adam-nudge.mjs) owns display accounting;
+// this path surfaces each matching nudge at most once per session (state.surfaced_nudges)
+// and respects expiry + max_displays. Opt out with ADAM_NO_MIDSESSION_NUDGE.
+// UserPromptSubmit hook stdout is injected into the session context, so this is the
+// reliable surface (unlike PostToolUse). Any failure is swallowed — never block a prompt.
+function surfaceMatchingNudges(state, cwd) {
+  if (process.env.ADAM_NO_MIDSESSION_NUDGE || !cwd) return;
+  const nudgesPath = join(ROOT, "active-nudges.json");
+  let raw;
+  try { raw = JSON.parse(readFileSync(nudgesPath, "utf8")); } catch { return; }
+  if (!Array.isArray(raw)) return;
+  const now = Date.now();
+  if (!Array.isArray(state.surfaced_nudges)) state.surfaced_nudges = [];
+  for (const n of raw) {
+    if (!n || typeof n !== "object" || typeof n.message !== "string" || !n.message) continue;
+    if (Number(n.expires_at_ts || 0) <= now) continue;
+    const max = Number(n.max_displays || 0);
+    if (max > 0 && Number(n.displays_used || 0) >= max) continue;
+    const cue = n.cue && typeof n.cue === "object" ? n.cue : null;
+    if (!cue || !cue.cwd || cue.cwd !== cwd) continue;   // cue-conditioned on cwd
+    const id = String(n.created_at || n.message);
+    if (state.surfaced_nudges.includes(id)) continue;
+    process.stdout.write(n.message + "\n");
+    state.surfaced_nudges.push(id);
+    if (state.surfaced_nudges.length > 50) state.surfaced_nudges.shift();
+  }
+}
+
 
 function resetFrictionCounters(state) {
   state.tools_since_user = 0;
@@ -315,6 +346,7 @@ function resetSessionLocal(state) {
   state.task_tool_kinds = {};
   state.task_tool_count = 0;
   state.task_corrections = 0;
+  state.surfaced_nudges = [];
 }
 
 function ensureStateDefaults(state) {
@@ -339,6 +371,7 @@ function ensureStateDefaults(state) {
   if (!Array.isArray(state.recentRecoveries)) state.recentRecoveries = [];
   if (typeof state.session_post_count !== "number") state.session_post_count = 0;
   if (!Array.isArray(state.context_ring)) state.context_ring = [];
+  if (!Array.isArray(state.surfaced_nudges)) state.surfaced_nudges = [];
 }
 
 function main() {
@@ -364,6 +397,7 @@ function main() {
   if (event === "UserPromptSubmit") {
     const prompt = (input.prompt || "").slice(0, 200);
     pushContext(state, { event: "user", prompt: excerpt(prompt, CONTEXT_EXCERPT_LEN), ts });
+    surfaceMatchingNudges(state, cwd);
     if (isCorrection(prompt)) {
       const last = state.tool_window[state.tool_window.length - 1] || {};
       appendJournal({