kb-rebuild-indexes

name	kb-rebuild-indexes
description	Rebuild the knowledge base shelf-index with hash-based change detection. Incremental by default — only re-extracts files whose content has changed since the last index. Use after ingesting new sources, after editing library files, or whenever the librarian agent reports a stale index.
disable-model-invocation	false
argument-hint	[--full]

Rebuild Knowledge Base Indexes

Script-based: This skill runs build_shelf_index.py via Bash — no agent dispatch needed and no library file content loaded into session context.

Rebuild the shelf-index for the knowledge base. Incremental by default: compares each library file's content hash against the recorded hash in the index, and only re-extracts entries whose hash has changed.

Arguments

• --full — Force complete rebuild. Re-extracts every entry even when the hash matches. Use this when:

  • The extraction logic itself has changed (you updated this skill)
  • You suspect the index has drifted in a way the hash check missed
  • You're starting from a deleted or corrupted index

  Without this flag, the rebuild is incremental and skips unchanged files.

Preflight

Verify the project has a knowledge base. The [Knowledge Base] section in CLAUDE.md should declare:

• library_path — default library/
• shelf_index_path — default library/_shelf-index.md

If CLAUDE.md does not contain a [Knowledge Base] section, report: "No knowledge base configured. Add a [Knowledge Base] section to CLAUDE.md (see plugins/sdlc-knowledge-base/skills/kb-init/templates/claude-md-section.md) before running this skill."

If the library path does not exist, report: "Library directory <path> does not exist. Create it or run /sdlc-knowledge-base:kb-init before running this skill."

Steps

1. Read knowledge base configuration

Read CLAUDE.md and locate the [Knowledge Base] section. Extract:

• library_path — default library/
• shelf_index_path — default library/_shelf-index.md

Stop with the preflight errors above if either check fails.

2. Verify build_shelf_index module importable

python3 -c "
import sys, os, importlib.util
PLUGIN_ROOT = os.environ.get('CLAUDE_PLUGIN_ROOT', '')
SCRIPTS = os.path.join(PLUGIN_ROOT, 'scripts')
INIT = os.path.join(SCRIPTS, '__init__.py')
if os.path.isfile(INIT) and 'sdlc_knowledge_base_scripts' not in sys.modules:
    spec = importlib.util.spec_from_file_location(
        'sdlc_knowledge_base_scripts', INIT,
        submodule_search_locations=[SCRIPTS])
    if spec and spec.loader:
        module = importlib.util.module_from_spec(spec)
        sys.modules['sdlc_knowledge_base_scripts'] = module
        spec.loader.exec_module(module)
try:
    import sdlc_knowledge_base_scripts.build_shelf_index  # noqa: F401
    print('OK')
except ImportError:
    print('MISSING')
"

If output is MISSING: report "build_shelf_index module not found. Update the sdlc-knowledge-base plugin." and stop.

3. Run the rebuild script

Construct the argument list from Step 1 and the skill argument (--full if provided):

python3 -c "
import sys, os, importlib.util
PLUGIN_ROOT = os.environ.get('CLAUDE_PLUGIN_ROOT', '')
SCRIPTS = os.path.join(PLUGIN_ROOT, 'scripts')
INIT = os.path.join(SCRIPTS, '__init__.py')
if os.path.isfile(INIT) and 'sdlc_knowledge_base_scripts' not in sys.modules:
    spec = importlib.util.spec_from_file_location(
        'sdlc_knowledge_base_scripts', INIT,
        submodule_search_locations=[SCRIPTS])
    if spec and spec.loader:
        module = importlib.util.module_from_spec(spec)
        sys.modules['sdlc_knowledge_base_scripts'] = module
        spec.loader.exec_module(module)
from sdlc_knowledge_base_scripts.build_shelf_index import main
args = ['<library_path>', '--shelf-index-path', '<shelf_index_path>']
# If this skill was called with --full, append it:
# args.append('--full')
sys.exit(main(args))
"

Replace <library_path> and <shelf_index_path> with the values from Step 1. If the skill argument was --full, uncomment the args.append('--full') line.

4. Report results

Print the script output directly to the user. Expected format:

Shelf-index rebuilt: library/_shelf-index.md

  Mode: incremental
  Files scanned: 22
  Unchanged:    18  (skipped)
  Modified:      3  (re-extracted)
  Added:         1  (new entries)
  Removed:       0  (entries dropped)

  Index entries: 22

If the script exits with code 1, surface the error and recommend:

• /sdlc-knowledge-base:kb-init — if the library directory is missing
• /sdlc-knowledge-base:kb-ingest — if the library exists but is empty

Hash strategy

SHA-256 over raw file content, stored per-entry in the shelf-index. Any file change (including whitespace) triggers re-extraction on the next incremental run. See build_shelf_index.py for the full implementation.

What this skill does NOT do

• It does not invoke the librarian. That's kb-query.
• It does not ingest new sources. That's kb-ingest.
• It does not validate citations. That's kb-validate-citations.
• It does not check for logical drift (contradictions, orphans). That's kb-lint.
• It does not rebuild the codebase-index. The codebase-index is a future feature.

This skill only manages the shelf-index for the curated library files.

Example invocation

/sdlc-knowledge-base:kb-rebuild-indexes

Shelf-index rebuilt: library/_shelf-index.md

  Mode: incremental
  Files scanned: 22
  Unchanged:    18  (skipped)
  Modified:      3  (re-extracted)
  Added:         1  (new entries)
  Removed:       0  (entries dropped)

  Index entries: 22