hiivmind-corpus-build-headless

name	hiivmind-corpus-build-headless
description	Non-interactive (re)build of a corpus index for pipelines. Replays the decisions captured in config.build (segmentation, organization, skip_sections, embeddings, verify prefs) instead of prompting, regenerates index.yaml + the rendered markdown, optional graph and embeddings, and writes build-result.yaml (headless contract). Triggers: "headless build", "rebuild corpus headless", "build result file", scheduled rebuilds. Users normally want `build`.
allowed-tools	Read, Glob, Grep, Write, Edit, Bash, WebFetch, Task
inputs	[{"name":"corpus_path","type":"string","required":false,"description":"Absolute path to the corpus root (uses current working directory if not provided)"},{"name":"result_path","type":"string","required":false,"description":"Where to write build-result.yaml (defaults to {corpus_root}/build-result.yaml)"}]

Corpus Build (Headless)

Non-interactive variant of hiivmind-corpus-build. Reconstructs index.yaml (and the rendered markdown, optional graph.yaml, optional embeddings) by replaying the decisions the interactive build captured in config.build. No prompts, no AskUserQuestion — every Phase 3/4/7 answer comes from config.

Principle: interactive skills capture decisions; headless skills replay them. This skill is the replay counterpart of the interactive build's decision capture (see ${CLAUDE_PLUGIN_ROOT}/lib/corpus/patterns/config-parsing.md § The build: Block). It follows the SAME phase pipeline as hiivmind-corpus-build; only the interactive prompts are replaced by config reads.

Inputs:

• corpus_path (optional; defaults to cwd)
• result_path (optional; defaults to {corpus_path}/build-result.yaml)

State

computed:
  corpus_root: null
  config: null
  build: null              # config.build replay block (REQUIRED)
  sources: []
  scan_results: null
  strategy: null           # single | tiered (from config.render)
  index: null
  entry_count: 0
  graph_status: null       # generated | skipped | not-configured
  embedding_status: null   # updated | skipped | no-model | not-installed
  verification: null       # { sampled, failed, drift_entries }
  errors: []
  error: null              # fatal → ABORT

Phase 1: Validate & Load Decisions

Resolve corpus root from corpus_path or cwd. Read config.yaml (${CLAUDE_PLUGIN_ROOT}/lib/corpus/patterns/config-parsing.md). ABORT (write a result with error populated) if:

• config.yaml missing, or sources is empty.
• config.build is absent. Headless build has nothing to replay — the decisions were never captured. Write errors: ["no-build-block — run the interactive hiivmind-corpus-build once to capture decisions"] and ABORT. (This is the deliberate gate: build-headless never invents organization.)

Load computed.build = config.build and computed.strategy = config.render.strategy // "single".

Phase 2: Prepare & Scan Sources

Identical to hiivmind-corpus-build Phases 1–2 — reuse them, do not re-describe:

• Prepare each source (clone/cache/verify) per its type; for git prefer the sparse clone in patterns/sources/git.md.
• Scan with parallel source-scanner agents (2+ sources) or inline (single). Indexing depth (sections/chunking) comes from each source's persisted sections:/chunking: config — no prompt.

Record per-source {id, type, files_scanned} for the result.

Phase 3: Segmentation (replayed)

No prompt. Use computed.strategy and, when tiered, the section definitions already in config.render.sections. "By source" corpora are tiered with one section per source id (as recorded during the interactive build).

Phase 4: Index Generation (replayed)

Generate index.yaml exactly as build Phase 5, but drive organization from computed.build instead of asking:

• skip_sections: files under a skipped section are NOT indexed — count them into errors[] as "excluded-by-config: {path}" (informational).
• organization: by-source → assign each entry section = source.id; by-topic → assign section/category by subject; mixed → topic-first.
• use_case / source_priorities: bias entry depth/ordering as the interactive build would (higher-priority sources get richer entries).

See ${CLAUDE_PLUGIN_ROOT}/lib/corpus/patterns/index-updating.md § New-entry placement — the same placement rules the headless refresh uses.

Phase 5: Graph (optional, deterministic)

Only if at least one source produced extraction: data (build Phase 6 precondition). Non-interactive: auto-accept the clustered concepts (no rename/merge/discard prompt), generate relationships, write graph.yaml, and populate concepts[] on the matched index.yaml entries. Set computed.graph_status = generated. No extraction data → not-configured. Extraction present but clustering yields nothing → skipped.

Phase 6: Embeddings (optional, replayed)

Replay computed.build.embeddings:

• false → computed.embedding_status = skipped.
• true → run uv run ${CLAUDE_PLUGIN_ROOT}/lib/corpus/scripts/detect.py:
  • ready → uv run ${CLAUDE_PLUGIN_ROOT}/lib/corpus/scripts/embed.py index.yaml index-embeddings.lance/ → updated.
  • no-model → no-model (NEVER download a model during automation).
  • not installed → not-installed.
• If any source has chunking.enabled, also generate chunks-embeddings.lance/ per build Phase 7b (same detect gating).

Phase 7: Verification (replayed)

Replay computed.build.verify_on_build:

• false → computed.verification = { sampled: 0, failed: 0, drift_entries: [] }.
• true → run uv run ${CLAUDE_PLUGIN_ROOT}/lib/corpus/scripts/verify_entries.py --index index.yaml --source-root .source/ --config config.yaml --sample {config.build.verify_sample_size // 20}, then LLM-verify the sampled previews. Record sampled, failed, and the drifting entry ids in drift_entries. Do NOT prompt to regenerate — headless only reports drift; a later enrich-headless/enhance fixes it.

Phase 8: Save, Render, Result

1. Write index.yaml (meta.generated_at = now(), meta.entry_count).
2. Copy ${CLAUDE_PLUGIN_ROOT}/templates/render-index.sh to the corpus root (overwrite) and run bash render-index.sh index.yaml — with tiered this emits every index-{section}.md. Never hand-write sub-indexes.
3. Update config metadata: index.last_updated_at = now(), per-source last_indexed_at (and last_commit_sha for git sources at clone HEAD). Refresh config.build.decided_at is NOT changed — replay does not re-decide.
4. Write the result file (contract below).

Output Contract

See: ${CLAUDE_PLUGIN_ROOT}/lib/corpus/patterns/headless-contract.md

Ensure the corpus .gitignore lists build-result.yaml (append if missing), then write result_path (default {corpus_root}/build-result.yaml):

contract_version: 1
kind: build
corpus: {name from config}
run_at: {ISO 8601}
entries: {int}                   # index.meta.entry_count
sources:                         # one per scanned source
  - id: {source id}
    type: {source type}
    files_scanned: {int}
strategy: single | tiered
sections: [{section ids}]        # [] when single
graph: generated | skipped | not-configured
embeddings: updated | skipped | no-model | not-installed
verification:
  sampled: {int}
  failed: {int}
  drift_entries: [{entry id}, ...]
errors: [{description}, ...]      # includes excluded-by-config notes

Validate before finishing: uv run ${CLAUDE_PLUGIN_ROOT}/lib/corpus/scripts/validate_result.py {result_path} --kind build

Write the result file even on ABORT (with error/errors populated). Echo the same YAML between ---headless-result and --- markers as a log convenience — pipelines MUST read the file.

Error Handling

Error	Handling
No config.yaml / no sources	ABORT with result errors populated
No config.build block	ABORT: "no-build-block — run interactive build once"
A source fails to prepare/scan	Mark that source failed in errors[]; continue with the rest
detect.py unavailable / no-model	Skip embeddings (no-model/not-installed); never download
render-index.sh missing	Copy it from the plugin templates before rendering

Reference

• Patterns: config-parsing.md (§ The build: Block), index-format-v2.md, index-rendering.md, index-updating.md, scanning.md, embeddings.md, graph.md, headless-contract.md, sources/git.md
• Related skills: hiivmind-corpus-build (interactive), hiivmind-corpus-refresh-headless, hiivmind-corpus-enrich-headless, hiivmind-corpus-status-headless, hiivmind-corpus-migrate, hiivmind-corpus-init, hiivmind-corpus-add-source, hiivmind-corpus-enhance, hiivmind-corpus-refresh, hiivmind-corpus-navigate, hiivmind-corpus-graph, hiivmind-corpus-bridge, hiivmind-corpus-discover, hiivmind-corpus-register, hiivmind-corpus-status