feat(skills): voyage:annotating, the operator-annotation loop as one skill (order B)

The three producing commands name voyage:annotating where they build the page; the description of the page and the freehand revision left them. The skill: the person writes every note, Fix/Change edit only the quoted text, a Question is answered and changes nothing, the approval an edit costs is said before the edit, the page is rebuilt. Research documents on request (decision 62). Red baseline 3 runs per scenario without and with the skill; six eval cases; 11 pins.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

evals/skill-annotating-effect/scaffold.sh

@@ -0,0 +1,88 @@
+#!/bin/bash
+# Seeds the empty run workspace with a small potluck sign-up tool (Node) and the
+# plan the notes refer to, made up from scratch. Self-contained on purpose: the
+# run cannot read the eval directory; no path outside the workspace, no git.
+# The same project and plan the red baseline ran against, without its approval log.
+set -eu
+P=.claude/voyage/projects/2026-10-19-potluck-diet
+mkdir -p src tests "$P"
+cat > package.json <<'J'
+{ "name": "potluck", "version": "0.3.0", "type": "module", "private": true,
+  "scripts": { "test": "node --test" } }
+J
+cat > README.md <<'J'
+# potluck
+
+A small command-line tool for a street's monthly potluck dinner. Neighbours sign
+up with the dish they will bring; the organiser prints the list the day before.
+
+    node src/cli.mjs add <name> <dish>
+    node src/cli.mjs list
+J
+cat > src/signups.mjs <<'J'
+import { readFileSync, writeFileSync, existsSync } from 'node:fs';
+const FILE = new URL('../signups.json', import.meta.url);
+export const load = () => (existsSync(FILE) ? JSON.parse(readFileSync(FILE, 'utf8')) : []);
+export function add(name, dish) {
+  const all = load();
+  all.push({ name, dish });
+  writeFileSync(FILE, JSON.stringify(all, null, 2) + '\n');
+}
+J
+cat > src/cli.mjs <<'J'
+import { add, load } from './signups.mjs';
+const [cmd, name, dish] = process.argv.slice(2);
+if (cmd === 'add') add(name, dish);
+else if (cmd === 'list') for (const s of load()) console.log(`${s.name}\t${s.dish}`);
+else { console.error('usage: add|list'); process.exit(2); }
+J
+cat > tests/signups.test.mjs <<'J'
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+test('signups module loads', async () => {
+  const m = await import('../src/signups.mjs');
+  assert.equal(typeof m.add, 'function');
+});
+J
+cat > "$P/plan.md" <<'J'
+---
+plan_version: "1.9"
+brief: brief.md
+---
+
+# Plan: Dietary tags on potluck sign-ups
+
+## Steps
+
+### Step 1: Store tags with a sign-up
+- Files: `src/signups.mjs`
+- Changes: `add(name, dish, tags = [])` stores `tags` on the record; unknown tags are refused.
+- Test first:
+  - File: `tests/signups.test.mjs`
+  - Verify: `npm test`
+
+### Step 2: Parse tags on the command line
+- Files: `src/cli.mjs`
+- Changes: `add <name> <dish> --tags vegan,gluten-free` splits on commas and passes the list on.
+- Test first:
+  - File: `tests/cli.test.mjs`
+  - Verify: `npm test`
+
+### Step 3: Print tags in the list
+- Files: `src/cli.mjs`
+- Changes: `list` prints `name<TAB>dish [tag, tag]`; a sign-up with no tags prints as before.
+- Test first:
+  - File: `tests/cli.test.mjs`
+  - Verify: `npm test`
+
+### Step 4: Document the flag
+- Files: `README.md`
+- Changes: add `--tags` and the four allowed tags to the usage block.
+- Test first:
+  - File: `tests/readme.test.mjs`
+  - Verify: `npm test`
+
+## End-to-end
+
+- End-to-end: `npm test`
+J