v0.3.1: code review pass + DX overhaul

Bug fixes (HIGH):
- adam-observe.mjs: errorFingerprint no longer false-positives when
  toolResponse.is_error === false; ERROR_RE only used as fallback when
  is_error is undefined.
- adam-observe.mjs: resetSessionLocal now clears tool_window so retry_loop
  cannot fire on the first tool of a new session by matching prior session.
- adam-archive.mjs: ts dedup uses Map<ts, count> instead of Set<ts>; two
  journal entries sharing a millisecond are no longer both archived when
  only one is referenced in source_entries.
- adam-nudge.mjs: only counts proposal filenames matching
  /^\d{4}-\d{2}-\d{3}-/ pattern; README/notes in proposals/ no longer bump.
- skills/adam-self-improvement/SKILL.md: contradiction_flag veto now applied
  at apply time (carry-over from earlier review).

Test isolation:
- adam/tests/run-tests.sh: ALWAYS runs against an isolated $HOME under
  mktemp -d. Previously truncated live ~/.claude/adam/journal.jsonl on
  every run — destructive on production state.

Conciseness:
- agents/adam.md: -19 LOC (cuts: vestigial cursor sentence, duplicate
  not-do bullets, blast-radius bullet collapse, Inputs paths delegate to
  SKILL.md, win-cluster-vs-struggle-cluster commentary already enforced
  by cluster-key separation, # Overlap section spec compressed).
- skills/adam-self-improvement/SKILL.md: -4 LOC (framing paragraph, dead
  catch-all bullet for non-eligible types).

Auto-prune script DELETED:
- The cumulative-count primitive cannot distinguish "never used" from
  "used before tracking began"; mtime gate is meaningless for installed
  files. Auto-prune deferred to v0.4 with a per-key lastSeen schema.

Cross-platform:
- macOS (BSD coreutils) and Linux (Alpine, glibc + musl) verified.
- All scripts use portable forms (stat -f || stat -c, mktemp -d -t).
- README documents platform support explicitly.

DX overhaul:
- install.sh: hardened — supports `curl | bash` via auto-clone,
  --version=vX.Y.Z pinning, --yes / --dry-run flags, jq-based
  settings.json merge with diff prompt and backup, conservative file
  copy that detects local mtime drift and writes <file>.adam-new
  instead of clobbering, idempotent across re-runs.
- adam-uninstall.sh: NEW. Soft-archives ~/.claude/adam/ to .bak.<ts>/
  by default; --purge to delete; --yes for non-interactive; jq-based
  settings.json cleanup with diff prompt.
- README.md: curl one-liner install + version-pinned variant at top,
  What's New section through v0.3.1, upgrade-safe data files callout,
  uninstaller documentation, platform support note, expanded rubric
  showing skill_edit gate.

Test count: 27 passed, 0 failed (was 27 — no regression).

adam/scripts/adam-archive.mjs

@@ -81,15 +81,20 @@ function main() {
   }
 
   const lines = readFileSync(JOURNAL, "utf8").split("\n").filter(Boolean);
-  const tsSet = new Set(sourceEntries);
+  // tsCounts: how many entries with this ts the proposal claims as its own.
+  // Same-millisecond duplicates: only consume up to the recorded count.
+  const tsCounts = new Map();
+  for (const ts of sourceEntries) tsCounts.set(ts, (tsCounts.get(ts) || 0) + 1);
   const matched = [];
   const remaining = [];
 
   for (const line of lines) {
     try {
       const e = JSON.parse(line);
-      if (e.ts && tsSet.has(e.ts)) {
+      const remainingCount = e.ts ? (tsCounts.get(e.ts) || 0) : 0;
+      if (remainingCount > 0) {
         matched.push(line);
+        tsCounts.set(e.ts, remainingCount - 1);
       } else {
         remaining.push(line);
       }