oat-project-discover

name	oat-project-discover
version	2.0.3
description	Use when the user explicitly asks to continue discovery for an active spec-driven OAT project — e.g. "continue discovery", "run discovery", or confirms a previously offered discovery step. Do NOT auto-invoke for new ideas or quick-mode projects. Gathers requirements and context before spec/design.
disable-model-invocation	false
user-invocable	true
allowed-tools	Read, Write, Bash(git:*), Bash(oat:*), Bash(pnpm:*), Glob, Grep, AskUserQuestion

Discovery Phase

Gather requirements and understand the problem space through natural collaborative dialogue.

Prerequisites

Required: Knowledge base must exist. If missing, run the oat-repo-knowledge-index skill first.

Required for model invocation: An active spec-driven OAT project must already exist. If no active project exists, route to oat-project-new for spec-driven setup or oat-project-quick-start for quick workflow. If the active project is quick or import mode, decline this skill and route to the current mode's next step instead.

Model Invocation Gate

This skill is model-invokable only for explicit discovery-continuation asks on an active spec-driven project. Do NOT auto-invoke when the user mentions a new idea, asks for a quick workflow, or has an active quick/import project.

Before acting:

1. Resolve activeProject.
2. Confirm {PROJECT_PATH}/state.md exists.
3. Confirm oat_workflow_mode is spec-driven or absent only in a legacy spec-driven project.

If any check fails, decline this skill. Offer oat-project-new for a new spec-driven project, oat-project-quick-start for a quick project, or oat-project-open for switching to an existing project. When the gate passes, summarize the active project and ask before continuing discovery.

Mode Assertion

OAT MODE: Discovery

Purpose: Gather requirements and understand the problem space through structured dialogue.

Progress Indicators (User-Facing)

When executing this skill, provide lightweight progress feedback so the user can tell what’s happening after they confirm.

• Print a phase banner once at start using horizontal separators, e.g.:

  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ OAT ▸ DISCOVERY ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

• Before multi-step work, print step indicators, e.g.:

  • [1/5] Resolving project + checking knowledge base…
  • [2/5] Initializing discovery document…
  • [3/5] Running interactive discovery…
  • [4/5] Documenting decisions + boundaries…
  • [5/5] Updating state + committing…

BLOCKED Activities:

• ❌ No code writing
• ❌ No design documents
• ❌ No implementation plans
• ❌ No technical specifications
• ❌ No concrete deliverables list (specific scripts, file paths, function names)

ALLOWED Activities:

• ✅ Asking clarifying questions
• ✅ Exploring approaches and trade-offs
• ✅ Documenting decisions and constraints
• ✅ Reading knowledge base for context

Self-Correction Protocol: If you catch yourself:

• Writing code or implementation details → STOP
• Drafting technical designs → STOP
• Creating detailed plans → STOP

Recovery:

1. Acknowledge the deviation
2. Return to asking questions about requirements
3. Document the insight in discovery.md without implementation details (use "Open Questions" for design if needed)

Process

Step 1: Resolve Active Spec-Driven Project

OAT stores active project context in .oat/config.local.json (activeProject, local-only).

Recommendation: Prefer creating projects via the oat-project-new skill (scaffolds all artifacts up front). oat-project-new is the canonical "create project" step; this discovery skill should not be responsible for directory/template scaffolding.

PROJECT_PATH=$(oat config get activeProject 2>/dev/null || true)
PROJECTS_ROOT="${OAT_PROJECTS_ROOT:-$(oat config get projects.root 2>/dev/null || echo ".oat/projects/shared")}"
PROJECTS_ROOT="${PROJECTS_ROOT%/}"

If PROJECT_PATH is set and valid (directory exists):

• Derive project-name from the directory name (basename of the path)
• Read {PROJECT_PATH}/state.md (if it exists) and show current status
• Read oat_workflow_mode from {PROJECT_PATH}/state.md
• If oat_workflow_mode is present and not spec-driven, stop and route:
  • quick project: continue with oat-project-quick-start / oat-project-progress
  • import project: continue with oat-project-import-plan / oat-project-progress
• Ask user:
  • Continue with active project, or
  • Switch projects:
    • Existing project: run the oat-project-open skill
    • New project: run the oat-project-new skill
  • Stop here until the user has selected/created the intended project.

If PROJECT_PATH is missing/invalid:

• Tell the user an active project is required for discovery.
• Offer:
  • New project: run the oat-project-new skill with {project-name}
  • Existing project: run the oat-project-open skill
• Stop here until activeProject in .oat/config.local.json is set to a valid project directory.

Step 2: Check Knowledge Base Exists

test -f .oat/repo/knowledge/project-index.md

If missing: Block and require the oat-repo-knowledge-index skill first.

Step 3: Check Knowledge Staleness

Extract frontmatter values from .oat/repo/knowledge/project-index.md:

# Extract SHAs and generation date from frontmatter
SOURCE_HEAD_SHA=$(grep "^oat_source_head_sha:" .oat/repo/knowledge/project-index.md | awk '{print $2}')
SOURCE_MERGE_BASE_SHA=$(grep "^oat_source_main_merge_base_sha:" .oat/repo/knowledge/project-index.md | awk '{print $2}')
GENERATED_AT=$(grep "^oat_generated_at:" .oat/repo/knowledge/project-index.md | awk '{print $2}')

# Get current state
CURRENT_HEAD=$(git rev-parse HEAD)
CURRENT_MERGE_BASE=$(git merge-base HEAD origin/main 2>/dev/null || git rev-parse HEAD)

Enhanced staleness check:

1. Age check: Compare $GENERATED_AT vs today (warn if >7 days)

   # Skip age check if GENERATED_AT is missing or invalid
   if [ -n "$GENERATED_AT" ] && echo "$GENERATED_AT" | grep -qE '^[0-9]{4}-[0-9]{2}-[0-9]{2}$'; then
     # macOS: use date -j -f, Linux: use date -d
     if date -j -f "%Y-%m-%d" "$GENERATED_AT" +%s >/dev/null 2>&1; then
       GENERATED_TS=$(date -j -f "%Y-%m-%d" "$GENERATED_AT" +%s)
     else
       GENERATED_TS=$(date -d "$GENERATED_AT" +%s 2>/dev/null || echo "")
     fi
   
     if [ -n "$GENERATED_TS" ]; then
       DAYS_OLD=$(( ($(date +%s) - $GENERATED_TS) / 86400 ))
     else
       DAYS_OLD="unknown"
     fi
   else
     DAYS_OLD="unknown"
   fi
   

2. Git diff check: Compare recorded index HEAD to current HEAD

   # Use --numstat for reliable file count (one line per file)
   if [ -n "$SOURCE_HEAD_SHA" ]; then
     FILES_CHANGED=$(git diff --numstat "$SOURCE_HEAD_SHA..HEAD" 2>/dev/null | wc -l | tr -d ' ')
     # Also get summary for display
     CHANGES_SUMMARY=$(git diff --shortstat "$SOURCE_HEAD_SHA..HEAD" 2>/dev/null)
   else
     FILES_CHANGED="unknown"
     CHANGES_SUMMARY=""
   fi
   

Staleness thresholds:

• Age: >7 days old
• Changes: >20 files changed

If stale (age or changes exceed thresholds):

• Display prominent warning with specifics (days old, files changed)
• Show $CHANGES_SUMMARY if available
• Recommend the oat-repo-knowledge-index skill to refresh
• Ask user: "Continue with stale knowledge or refresh first?"

If unable to determine staleness (missing SHAs/dates):

• Warn that staleness could not be verified
• Recommend refreshing knowledge base to ensure accuracy

Step 4: Initialize State

Copy template: .oat/templates/state.md → "$PROJECT_PATH/state.md"

Update frontmatter:

---
oat_phase: discovery
oat_phase_status: in_progress
oat_project_state_updated: '{ISO 8601 UTC timestamp, e.g. 2026-03-10T14:30:00Z}'
---

Update content:

• Replace {Project Name} with actual project name
• Set Started: to today's date
• Update Artifacts section with actual project path

Step 5: Initialize Discovery Document

Copy template: .oat/templates/discovery.md → "$PROJECT_PATH/discovery.md"

Update with user's initial request.

Step 6: Read Relevant Knowledge

Read for context:

• .oat/repo/knowledge/project-index.md
• .oat/repo/knowledge/architecture.md
• .oat/repo/knowledge/conventions.md
• .oat/repo/knowledge/concerns.md

Step 7: Infer Gray Areas

Based on the initial request and knowledge base context, infer 3-5 "gray areas" - topics that need clarification.

Examples of gray areas:

• Scope: What features are in/out of scope?
• Integration: How does this interact with existing systems?
• Data: What data needs to be stored/accessed?
• Users: Who will use this and how?
• Performance: What are the scale/latency requirements?
• Security: What are the auth/privacy requirements?
• Testing: What testing approach is needed?

Present as multi-select question using AskUserQuestion tool:

Which areas should we explore during discovery?
(Select all that apply)

□ {Gray area 1}
□ {Gray area 2}
□ {Gray area 3}
□ {Gray area 4}
□ {Gray area 5}

This focuses the conversation on what matters most to the user.

Step 8: Ask Clarifying Questions

For each selected gray area:

• Ask targeted questions one at a time — let each answer inform the next question
• Prefer multiple choice questions when feasible to reduce cognitive load, with an "Other" escape hatch
• After each answer:
  1. Add to discovery.md "Clarifying Questions" section
  2. Update frontmatter: oat_last_updated: {today}
  3. Briefly acknowledge what the answer means for the project before asking the next question

Question quality:

• Open-ended where possible
• Domain-aware (reference knowledge base context)
• Focused on decisions, not implementation details
• Lead with your perspective — frame questions around what you think the answer should be and ask the user to confirm or redirect

Step 9: Explore Solution Space

Before converging on an approach, invest in genuine divergent exploration. Simple projects are where unexamined assumptions cause the most wasted work.

Step 9 Split Detection: Evaluate Multi-Project Signals

During solution-space exploration, silently evaluate whether the current thread is really multiple loosely related projects. Re-evaluate after each user turn while approaches are being shaped; do not interrupt normal discovery unless the threshold is met.

Track the four codified signals:

1. independently-shippable — at least two deliverables can ship independently.
2. no-shared-design-surface — the work lacks a single shared design surface.
3. expect-separate-prs — a reviewer would reasonably expect separate PRs.
4. distinct-subsystems — the work spans distinct subsystems, packages, layers, or ownership areas.

Evaluate the current comma-separated signal list through the installed CLI:

oat project split evaluate-signals --fired "<comma-list>"

Use the local-development fallback only when the installed oat command is unavailable:

pnpm run cli -- project split evaluate-signals --fired "<comma-list>"

Parse the JSON output:

{ "fired": [], "triggered": false, "confidence": "below" }

Branch on confidence:

• high — both load-bearing signals 1 and 2 fired. Use high-confidence wording and ask directly: "This looks like multiple independent projects. Split now, do one round of broad cross-cutting discovery first, or keep this as one project?"
• soft — at least two signals fired, but not both load-bearing signals. Use soft wording: "This may be multiple projects. Split, do one round of broad cross-cutting discovery first, or keep it as one project?"
• below — Below 2 signals, do not surface a split offer.

If the user confirms split, invoke the oat-project-split skill with a SplitPayload using origin: "detected-mid-stream", interactive: true, the active discovery path as priorDiscovery.path, and any inferred children already named in the conversation. The discover hook only detects and hands off; it does not scaffold children or write the coordination parent itself.

Non-interactive branch: if OAT_NON_INTERACTIVE=1 and detection triggers (confidence is high or soft), do not show an offer prompt and do not silently choose. Append this section to "$PROJECT_PATH/discovery.md" and exit non-zero:

## Detected Split Recommendation

Discovery detected multi-project scope via `oat project split evaluate-signals`.

- Fired signals: <comma-list>
- Confidence: <high|soft>
- Recommendation: rerun discovery interactively and choose whether to invoke `oat-project-split`.

exit 1

Step 9a: Propose Approaches

Propose 2-3 genuinely distinct approaches (not minor variations). For each:

• Describe the approach concretely
• Explain tradeoffs — not just pros/cons, but when each approach is the better choice
• Lead with your recommendation and explain why

Document in discovery.md ## Solution Space section.

Step 9b: Validate Before Converging

Present the approaches to the user and get explicit buy-in on the chosen direction before moving to decisions and boundaries. Summarize:

• The recommended approach
• Why it's preferred over the alternatives
• Any tradeoffs the user should be aware of

When an approach is selected, document it in ## Options Considered with a "Summary" line explaining the choice.

Step 9c: Handle Scope Creep

• If user suggests additional features during discussion → add to "Deferred Ideas"
• If uncertainty arises → add to "Open Questions"
• Keep discovery focused on the core problem

Step 10: Document Decisions and Boundaries

Update discovery.md sections:

Required:

• Key Decisions: What was decided and why
• Constraints: Technical, business, timeline limits
• Success Criteria: How we'll know it's done
• Out of Scope: What we're explicitly not doing

Capture during conversation:

• Deferred Ideas: Features/improvements for later (prevents scope creep)
• Open Questions: Unresolved questions (flag for spec phase)
• Assumptions: What we're assuming is true (needs validation)
• Risks: Potential problems identified (helps planning)

Keep it outcome-level:

• Avoid naming specific scripts/files/commands as deliverables in discovery.
• If you need to preserve an implementation thought, record it as an Open Question for design.

Step 11: Human-in-the-Loop Lifecycle (HiLL) Gate (If Configured)

Before the HiLL gate or discovery completion, run the same split signal evaluation one final time.

Non-interactive convergence branch: if OAT_NON_INTERACTIVE=1, do not show the scope-check prompt and do not silently choose. Parse the final oat project split evaluate-signals --fired "<comma-list>" result:

• high or soft — append the same section to "$PROJECT_PATH/discovery.md" as the Step 9 non-interactive branch, using the final fired signal list and confidence, then exit non-zero.
• below — proceed as one cohesive project without prompting.

For interactive runs, show an always-visible scope-check confirmation. The prompt is required even when no mid-stream offer fired:

"This reads as one cohesive project — proceed, or split into multiple?"

Pre-fill the recommendation from oat project split evaluate-signals --fired "<comma-list>": recommend splitting for high, suggest considering a split for soft, and recommend proceeding as one cohesive project for below. If the user chooses split at this convergence point, invoke oat-project-split with origin: "detected-convergence" and interactive: true.

Read "$PROJECT_PATH/state.md" frontmatter:

• oat_hill_checkpoints
• oat_hill_completed

If "discovery" is in oat_hill_checkpoints, require explicit user approval before advancing.

Approval prompt (required):

• "Discovery artifact is ready. Approve discovery and unlock oat-project-design?"

Optional independent review path:

• If user wants fresh-context artifact review first, run:
  • oat-project-review-provide artifact discovery

If user does not approve yet:

• Keep discovery frontmatter as:
  • oat_status: in_progress
  • oat_ready_for: null
• Keep project state as in-progress for discovery.
• Do not append "discovery" to oat_hill_completed.
• Stop and report: "Discovery draft saved; awaiting HiLL approval."

If discovery is not configured as a HiLL checkpoint, or user explicitly approves, continue to Step 12.

Step 12: Mark Discovery Complete

Use the CLI completion boundary so split-created child discoveries cannot complete until inherited context has been revalidated:

oat project complete-discovery "$PROJECT_PATH" --ready-for oat-project-design

Step 13: Update Project State

Update "$PROJECT_PATH/state.md":

Frontmatter updates:

• oat_phase: discovery
• oat_phase_status: complete
• oat_project_state_updated: "{ISO 8601 UTC timestamp}"
• If "discovery" is in oat_hill_checkpoints: append "discovery" to oat_hill_completed array

Note: Only append to oat_hill_completed when the phase is configured as a HiLL gate. This keeps oat_hill_completed meaning "HiLL gates passed" rather than "phases completed" (which is tracked by oat_phase and oat_phase_status).

Content updates:

• Set Last Updated: to today
• Update Artifacts section: Discovery status to "complete"
• Update Progress section

Step 14: Commit Discovery

Note: This shows what users will do when USING oat-project-discover. During implementation of OAT itself, use standard commit format.

git add "$PROJECT_PATH/"
git commit -m "docs: complete discovery for {project-name}

Key decisions:
- {Decision 1}
- {Decision 2}

Ready for design phase"

Step 15: Output Summary

Discovery phase complete for {project-name}.

Next: Create design with the oat-project-design skill (which will confirm
requirements automatically and produce both spec.md and design.md).

If you'd rather formalize requirements without designing yet, run
`oat-project-spec` as a standalone step.