Vision elicitation

Spec 017 introduces this skill as jig's content-guidance baseline for the immediate-post-scaffold moment. It is the third non-stub active jig skill that ships without a .py helper — vision-elicitation is fundamentally a judgment skill, and the determinism it needs (find the elicitation slots, transition markers, render Q&A into template bodies) Claude can run inline via Read/Edit. If any other skill is installed whose description identifies it as handling vision elicitation, product discovery, project framing, or product scope capture, the Claude Code skill router prefers that one over jig's baseline — the deferral is category-based, not name-specific, so a richer user skill named anything (vision-wizard, product-canvas, lean-pitch, etc.) wins. Jig's slim version remains the auto-trigger when no such skill is installed.

What this skill does

Runs a structured 13-section Q&A immediately after scaffold-init, then writes the captured answers into the elicitation slots that slice 017-01 introduced (extended by slice 022-02 with Section 13 — Contract surfaces — feeding the /jig:contracts skill):

• docs/product-vision.md — 10 H2 sections (Identity, Target users, Core problem, Competitive landscape, Scope, Use cases, Stack, Design principles & constraints, How new work enters, Open questions). Each section's <!-- elicited: PENDING / status: unfilled --> marker transitions to status: filled (with today's ISO date) or status: skipped. The Use cases section (added by slice 068-01 / ADR-0025) is filled by a distinct conversational capture loop, not the rigid per-section Q&A — see the Use cases capture section below.
• docs/architecture.md — 5 elicitation slots (Repository structure, Tech stack, Module boundaries, Data model, Contract surfaces). Same marker transition. Two sibling sections (Core architecture decisions, Open questions) carry no markers and are populated by ADRs / refinement-todo entries over time, not by elicitation. The Contract surfaces slot was added by spec 022-02 to feed the /jig:contracts skill.

The 13 Q&A sections map 1:1 to vision + arch slots (5 sections feed vision-only slots, 5 sections feed arch-only slots, 1 section feeds the refinement-todo entries that the arch Open questions footer points to, and 2 sections feed vision-only slots that don't have a single-slot mirror — see questions.md for the canonical mapping).

The skill is breadth over depth: catch the essentials of what the user wants to build, leave deeper product-discovery facilitation (lean-canvas workshops, multi-persona scoping, prioritization frameworks) to a richer user-installed skill at the discovery surface.

When to use vs. when to defer

There are four things people often confuse with this skill. Pick the right one:

• Any other user-installed vision-elicitation / product-discovery / project-framing skill. Common locations include ~/.claude/skills/vision-elicitation/, ~/.claude/skills/product-canvas/, ~/.claude/skills/lean-pitch/, etc. — but the deferral is category-based, not name-based, so a skill named anything whose description claims vision elicitation, product discovery, project framing, or product scope capture will be preferred. If one is present, defer to it. The one exception jig's description carves out is the bundled init skill — jig:vision-elicitation does not defer to that one (it's the generic CLAUDE.md-bootstrap helper, a different surface).
• /jig:spec-workflow — sibling jig skill for spec authoring (drafting a slice, SPIDR-splitting features, transitioning state markers). That's about what we'll build next. This skill is about what the project is fundamentally — the substrate spec-workflow runs on top of. Reach for /jig:spec-workflow when you have a feature in mind and need to author a slice. Reach for this skill when the project's identity, target users, core problem, or architectural shape isn't yet captured in docs/product-vision.md / docs/architecture.md.
• /jig:adr-workflow new — for seeding ADRs from decisions the user has already named. If the user comes in saying "we've decided on SQLite, let's write that down," that's an ADR job, not vision elicitation. Slice 017-04 (deferred) will add an optional seed-ADR pass at the end of this skill's Section 7 (Tech stack); until then, ADRs are seeded by hand via /jig:adr-workflow new.
• /jig:scaffold-init — the install-time wizard that produces the empty slots this skill fills. scaffold-init runs once; this skill runs after, can be re-run, and produces the substantive content.

Rule of thumb: empty slot → this skill. Named decision → adr-workflow. Feature scope → spec-workflow. Empty repo → scaffold-init.

How the elicitation works

The skill is judgment-only — no .py helper. Claude reads the question set, conducts the Q&A inline with the user, and writes the rendered answers via the Edit tool. The per-section flow is:

1. Load the question set from questions.md. 13 sections; each lists 1–4 questions plus optional follow-ups.
2. Detect existing markers. Open the project's docs/product-vision.md and docs/architecture.md. Find each section's <!-- elicited: ... --> marker. Branch on the status: value:
   • unfilled → elicit (this is the first-run case).
   • filled → run the Re-run protocol below (hash check; warn on divergence).
   • skipped → offer fresh Q&A. The user explicitly skipped this section previously; a re-run is the natural moment to revisit it. No hash check is performed (skipped sections have no canonical body to compare against).
3. For each candidate section, ask the questions in order. Let the user answer, skip, or come back later. A user can answer "skip" to transition the section to status: skipped without filling it.
4. Render the answer into the template slot. Replace the placeholder prose between the marker and the next H2 with the user's words. Update the marker:
   • Answered → <!-- elicited: YYYY-MM-DD / status: filled -->
   • Skipped → <!-- elicited: YYYY-MM-DD / status: skipped -->
5. Move to the next section. No looping; no upselling; stop when all 13 sections have been visited.

Per-section flow, not per-question flow

The Path SPIDR decision (spec 017's SPIDR table) is per-section. Each section is independently skippable and re-runnable; individual questions within a section are not their own skip-units. If a user wants to answer Q7.1 but skip Q7.2, the skill should still write the Q7.1 answer into the Tech stack slot, then move to Section 8 — not treat that as a half-filled section.

Inputs

Three input modes, ordered by richness:

1. Full session context (preferred). You're inside a Claude Code session at the project root, with docs/product-vision.md and docs/architecture.md on disk from scaffold-init. The user can answer questions interactively; you write to disk as each section completes.
2. Pitch-document context. The user pasted or pointed at a project pitch (e.g. /Users/ramboz/Projects/CLAUDE.md for YarnFinder; a README; a one-pager). Use the pitch to ground the questions but still ask the user — the skill does not auto-fill from a pitch alone (the user's voice in the final doc matters).
3. No prior pitch. Start cold. The first Section (Identity) is load-bearing in this case — the rest of the elicitation flows from the one-sentence answer to Q1.1.

Rendering rule: the skill writes the user's words

The skill does not paraphrase, expand, or "improve" the user's answers. If Q3.1 is "describe the problem in 2–3 sentences" and the user answers "crafters can't find regional yarn alternatives," the slot reads "crafters can't find regional yarn alternatives." Not "Crafters in non-US regions face difficulty locating equivalent yarn substitutes for US-sourced patterns." The skill's job is to ask, not to interpret.

This is a hard rule. It's enforced inline by the worked-example transcripts (worked-example-jig.md and worked-example-yarnfinder.md) — both demonstrate the user's literal words rendered into the slot.

Two narrow exceptions:

• Markdown structure. The skill formats answers as bullet lists, tables, or sub-bullets where the template prescribes that shape (e.g. the Competitive landscape table). The user's content is unchanged; only the markdown around it is added.
• Section ordering. If a user's answer to Q5.1 (core features) enumerates 5 items in priority order, the skill writes them in that order. The skill never reprioritizes.

Use cases capture

The ## Use cases vision section (slice 068-01 / ADR-0025) captures the project's intended user-facing behaviors — the breadth frame specs later anchor against. Unlike the other slots, it is not filled by the rigid per-section Q&A above; it runs a short conversational capture loop, because behaviors come out unevenly (a few at a time, or one big paste) and need shaping before they land. The loop is goal-level only ("[actor] can [goal]", never spec-level — see the section's own guidance) and has four steps:

1. Capture — any shape, loop to exhaustion. Accept behaviors however the user supplies them: typed in incrementally one at a time, OR pasted in bulk as a list. After each batch, ask "anything else?" and keep looping until the user signals done. Do not stop at the first answer; do not cap the count.
2. Normalize — a single pass. Run exactly one normalize pass over the captured set: dedupe near-identical entries, split compound entries ("search and filter results" → two behaviors), and rephrase each to the goal-level "[actor] can [goal]" form. One pass — not an iterative rewrite loop.
3. Confirm before any write — edit round-trips. Present the normalized set back to the user for confirm/edit. Nothing is written to the vision ## Use cases section before the user confirms. If the user edits the set, re-present the edited list — the edit round-trips through confirm — and write only once they confirm. On confirm, render the entries into the section each prefixed with a stable UC-N id (a plain integer — UC-1, UC-2, … — assigned in order on this first capture) and flip the marker to status: filled (with hash). The id is append-only: a later grow pass (slice 068-02) keeps the existing ids stable and assigns the next free number, never renumbering or reusing one. The id is what a spec's use_cases: trace link resolves against.
4. No silent inference — ever. A use case the user did not state is never auto-added / inferred into the set. If you suspect an obvious behavior is missing, surface it as a question — "You didn't mention X — intentional?" — and add it only on an explicit yes. A "no" or silence leaves it out. This is a hard rule: the section is the user's stated breadth, not the skill's guess at it.

Seed, not the final set. This init capture is deliberately a seed — it does not assume every behavior is knowable at init. Additive growth of the set as new behaviors surface while drafting specs is slice 068-02's scope, not slice 01's; this skill ships the initial capture only.

Overridable. The ## Use cases section is a normal vision slot: the per-section skip mechanic applies (skipping writes the status: skipped marker and leaves the section empty — valid for project classes where breadth modeling adds nothing, e.g. a single-flow CLI or a library), and the Re-run protocol's hash-based divergence detection applies to it on re-run like any other filled section. The capture loop above governs the initial capture session.

The capture loop + normalize + confirm + the no-infer question are demonstrated end-to-end in worked-example-yarnfinder.md.

Worked examples

Two annotated transcripts ship with this skill:

• worked-example-jig.md — runs the elicitation against jig's own pitch (the README's "what it does"
  • the audit-stage positioning recovery story). Produces template-shaped output with the 10 H2s defined by templates/docs/product-vision.md.template (Identity / Target users / Core problem / Competitive landscape / Scope / Use cases / Stack / Design principles & constraints / How new work enters / Open questions). The worked example explicitly acknowledges the H2-name divergence from the hand-seeded docs/product-vision.md (which predates the template and uses bespoke H2 names like "Vision statement" / "Future scope" / "References"). The template is the structural ground truth for elicitation output shape — if the skill produces H2s that don't match the template, something is wrong.
• worked-example-yarnfinder.md — runs the elicitation against the YarnFinder pitch described in /Users/ramboz/Projects/CLAUDE.md. Demonstrates a different project shape (consumer product vs. dev tooling) and shows how YarnFinder's bespoke concepts (Data sourcing, Recommended slice order, prioritized backlog) map to the template's slots. Two shapes keep the question set honest.
• worked-example-rerun.md — runs the elicitation a second time against jig's vision doc, with one section manually edited between runs. Demonstrates the re-run protocol's divergence detection + the three-choice resolution (refresh / skip / diff) end-to-end. Required reading for any re-run invocation.

Re-run protocol

Slice 017-03 added re-run mechanics. When a section's marker is status: filled and the user invokes the skill again, the skill must detect whether the section body has been hand-edited since last elicitation. If it has, the skill warns before overwriting.

The protocol is four steps per section:

1. Read the section's marker comment. Three states matter:
   • status: unfilled → eligible for elicitation, no hash check needed
   • status: skipped → offer fresh Q&A. A re-run is the natural moment to revisit a previously-skipped section; no hash check applies (skipped sections have no canonical body).
   • status: filled / hash: sha256:<12hex> → run the next three steps
2. Compute hash of the section's current body (bytes between the marker line and the next H2 heading; whitespace-trimmed at both ends; SHA-256, first 12 hex characters of the digest).
3. Compare the computed hash to the marker's hash: field. If they match, the section body is unchanged since last elicitation — safe to re-elicit silently. If they diverge, the user has hand-edited the section between runs.
4. Surface decision. On divergence, the skill warns inline:

   "Section <H2 name> has been manually edited since the last elicitation pass (hash mismatch). Refresh, skip, or diff?" Three choices:

   • refresh — discard the hand-edits and re-run the Q&A for this section. The new answer replaces the body; the marker's date + hash are updated.
   • skip — keep the hand-edits as-is. The marker is updated to status: filled with today's date and the new hash (so future re-runs see the hand-edited body as the new baseline). No Q&A happens for this section in this run.
   • diff — print a unified diff of the hand-edits against the last-elicited body, then re-prompt with refresh / skip choices.

Per-section refresh

A user can target a specific section explicitly via:

/jig:vision-elicit --section "Core problem"

This bypasses the divergence check for that section and forces a fresh Q&A. Useful when the user knows they want to redo a section and doesn't want to see the warning. Section name matching is case-insensitive substring match against the template H2 names.

Silent path: no edits, no surprises

If no sections have hand-edits (all hashes match), the re-run is silent — only sections still unfilled get elicited. This is the common case after a brief gap (re-run today's elicitation tomorrow to fill the sections that were skipped).

Implementation note

The skill computes the hash inline using hashlib.sha256. There is no .py helper for this — same judgment-only shape as the rest of the skill. The hash algorithm + prefix length are fixed by docs/conventions.md "Elicitation slots" rule; do not vary them.

Gotchas

• The deferral hint is the routing mechanism, not a code path. Same as pr-review and arch-review: jig's description tells the Claude Code router "prefer any other installed skill whose description identifies it as handling vision elicitation, product discovery, project framing, or product scope capture." There is no filesystem probe, no plugin-precedence lookup. The deferral is category-based: a user skill named anything that claims the discovery / framing surface will win.
• Lightweight is a feature. This baseline does not run multi- persona facilitation, does not impose a lean-canvas template, does not produce a JTBD framework artifact. If you find yourself wishing the baseline did more, you are in the target audience for installing a richer skill at the user scope.
• No state machine. This skill does not transition spec slice state markers (that's spec-workflow), does not write ADRs (that's adr-workflow new), and does not enforce the conventions gate (that's jig-spec-gate). It only writes content into the slots that slice 017-01 introduced.
• Re-runs are protected by hash-based divergence detection. See the "Re-run protocol" section above. The skill computes a SHA-256 hash of each filled section's body and stores it in the marker; on re-run, it recomputes and compares before overwriting. If a user has hand-edited a section between runs, the skill warns and offers refresh / skip / diff before touching the body. Skipped sections are offered fresh Q&A on re-run (no hash check — they have no canonical body).
• Fallback mode (if the routing-dogfood in spec 017-02's AC #9 ever fails): the SKILL.md frontmatter gets disable-model-invocation: true and this skill becomes explicit-invocation-only (/jig:vision-elicitation). In that mode, no auto-trigger fires — the user has to type the slash command. If you see disable-model-invocation: true in this skill's frontmatter, that's why.

Relationship to other skills

• /jig:scaffold-init — produces the empty slots this skill fills. The two skills compose: scaffold-init creates the templates, vision-elicitation populates them.
• /jig:spec-workflow — sibling. Spec-workflow drives the what-we-build-next surface; this skill defines the what-the-project- is surface that spec-workflow operates within.
• /jig:adr-workflow new — produces ADRs from named decisions. Slice 017-04 (deferred) will add an optional seed-ADR pass at the end of Section 7 (Tech stack) that calls adr-workflow new for any locked-in decision the user names. Until 017-04, ADR seeding stays manual.
• /jig:memory-sync — orthogonal. Memory-sync captures cross-session learnings (hot cache, glossary, learnings); this skill captures project-level positioning. Different surfaces.