a20: 7-deep candidate list, roll 3-7, reproduction key printed + FORM/key telemetry in contract

Paul: no stochastic challenger-assignment mode (unreproducible bad draws
= undebuggable bug reports); keep the weigh-off. Every roll now prints
its key so any field report can be replayed with --from.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

skill/reference/new-work.md

@@ -12,9 +12,9 @@ Name one concrete subject, its audience, and the page's single job. The subject'
 
 ## Decide, then build
 
-Derive the concept with this procedure, recording each step in your reasoning before the next begins. One: state the product's unique mechanism in one sentence, the thing competitors cannot truthfully claim. Two: competitive analysis; describe the page this category always ships, and the counter-position page a contrarian ships, and treat both structures as off the table. Three: from the audience's world and the subject's cultural home, list five concrete materials, objects, documents, or rituals they know by heart, each with one line on why it resonates and can carry the mechanism, ordered by resonance. Four: run `node {{scripts_path}}/concept-seed.mjs` and follow what it prints: it assigns which candidate to build (your top-ranked candidate is what every run would ship; a single ranking is deterministic, so the dice come from outside) and supplies challenger forms to weigh against your list on exactly two axes, audience identification and product clarity. Five: the chosen form supplies the page's structure, reading order, and component conventions; the product supplies every fact. Conversion conventions are furniture inside the form, not the form: a hero that hooks in one line, a visible primary action, a legible reading order. The costume check closes the step: if a visitor would notice the form before the product, the candidate fails; take the runner-up. The chosen form also dictates the first viewport's geometry: render the form at the scale it has in life, edge to edge when that is its nature; embedding it as a panel inside a standard marketing layout forfeits it. Cinematic full-bleed openings, intentionally divergent grids, and color drenched across whole regions are in bounds whenever the form calls for them; on an unattended build, the safe layout is the risk. The form has native motion, what it does in life between states; give the page that motion once, orchestrated, rather than scattered hover effects. <!-- rule:skill-concept-procedure -->
+Derive the concept with this procedure, recording each step in your reasoning before the next begins. One: state the product's unique mechanism in one sentence, the thing competitors cannot truthfully claim. Two: competitive analysis; describe the page this category always ships, and the counter-position page a contrarian ships, and treat both structures as off the table. Three: from the audience's world and the subject's cultural home, list seven concrete materials, objects, documents, or rituals they know by heart, each with one line on why it resonates and can carry the mechanism, ordered by resonance. Four: run `node {{scripts_path}}/concept-seed.mjs` and follow what it prints: it assigns which candidate to build (your top-ranked candidate is what every run would ship; a single ranking is deterministic, so the dice come from outside) and supplies challenger forms to weigh against your list on exactly two axes, audience identification and product clarity. Five: the chosen form supplies the page's structure, reading order, and component conventions; the product supplies every fact. Conversion conventions are furniture inside the form, not the form: a hero that hooks in one line, a visible primary action, a legible reading order. The costume check closes the step: if a visitor would notice the form before the product, the candidate fails; take the runner-up. The chosen form also dictates the first viewport's geometry: render the form at the scale it has in life, edge to edge when that is its nature; embedding it as a panel inside a standard marketing layout forfeits it. Cinematic full-bleed openings, intentionally divergent grids, and color drenched across whole regions are in bounds whenever the form calls for them; on an unattended build, the safe layout is the risk. The form has native motion, what it does in life between states; give the page that motion once, orchestrated, rather than scattered hover effects. <!-- rule:skill-concept-procedure -->
 
-Then state the chosen direction as a contract, written as a comment block at the top of the artifact (invisible to visitors, binding for you), five short blocks, two hundred words at most. UNIQUE: the one idea this page owns. NOT-TEMPLATE: how the page's structure differs from the category's standard arrangement, stated plainly and honestly. OWN-WORLD: the palette and component language, specific enough that the components and colors alone, shown without content, would be recognizable as this page's world and nobody else's. STORY: what the visitor understands, believes, and does, from first viewport to action. FIRST VIEWPORT: the exact composition, what is where and at what scale. If any block is missing or reads like a mood, the direction isn't decided yet. The build is judged against this contract; delivering different pixels than the contract promises is a defect on whichever side is weaker. When a user can respond and the work is substantial, pause there for confirmation; when the harness has native image generation, follow [codex.md](codex.md)'s mock flow before code. When no user can respond, record the decision in your reasoning and proceed without pausing. Either way the decision comes first; code that precedes a direction is the template reflex in motion. <!-- rule:skill-decide-then-build -->
+Then state the chosen direction as a contract, written as a comment block at the top of the artifact (invisible to visitors, binding for you), five short blocks, two hundred words at most. UNIQUE: the one idea this page owns. NOT-TEMPLATE: how the page's structure differs from the category's standard arrangement, stated plainly and honestly. OWN-WORLD: the palette and component language, specific enough that the components and colors alone, shown without content, would be recognizable as this page's world and nobody else's. STORY: what the visitor understands, believes, and does, from first viewport to action. FIRST VIEWPORT: the exact composition, what is where and at what scale. FORM: the chosen candidate and its position on your ordered list, plus the seed key the script printed. If any block is missing or reads like a mood, the direction isn't decided yet. The build is judged against this contract; delivering different pixels than the contract promises is a defect on whichever side is weaker. When a user can respond and the work is substantial, pause there for confirmation; when the harness has native image generation, follow [codex.md](codex.md)'s mock flow before code. When no user can respond, record the decision in your reasoning and proceed without pausing. Either way the decision comes first; code that precedes a direction is the template reflex in motion. <!-- rule:skill-decide-then-build -->
 
 ## Plan, self-check, build
 

skill/scripts/concept-seed.mjs

@@ -40,15 +40,19 @@ const pool = JSON.parse(readFileSync(join(here, 'concept-ingredients.json'), 'ut
 
 const args = process.argv.slice(2);
 const fromIdx = args.indexOf('--from');
-const key = fromIdx !== -1 ? args[fromIdx + 1] : (process.env.IMPECCABLE_CONCEPT_SEED || null);
+// When no key is supplied, generate one and print it: a user reporting a
+// bad outcome can hand us the key and we replay the exact roll.
+const key = fromIdx !== -1
+  ? args[fromIdx + 1]
+  : (process.env.IMPECCABLE_CONCEPT_SEED || crypto.randomBytes(4).toString('hex'));
 
 function hashUnit(k, salt) {
   const h = crypto.createHash('sha256').update(`${salt}:${k}`).digest();
   return h.readUInt32BE(0) / 0xffffffff;
 }
-const unit = (salt) => (key ? hashUnit(key, salt) : Math.random());
+const unit = (salt) => hashUnit(key, salt);
 
-const buildIndex = 2 + Math.floor(unit('index') * 4); // 2..5
+const buildIndex = 3 + Math.floor(unit('index') * 5); // 3..7
 
 const entries = Object.entries(pool)
   .filter(([k]) => !k.startsWith('_'))
@@ -63,7 +67,7 @@ for (let i = 0; picks.length < 3 && i < 60; i++) {
   }
 }
 
-process.stdout.write(`CONCEPT SEED
+process.stdout.write(`CONCEPT SEED (key: ${key}; rerun with --from ${key} to reproduce this roll)
 BUILD INDEX: ${buildIndex}
   After ordering your derived candidates by resonance, build the page whose
   form comes from candidate number ${buildIndex}, exactly as if it had ranked