Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add SteveGJones/ai-first-sdlc-practices/plugin install sdlc-knowledge-baseWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/stevegjones/ai-first-sdlc-practices/kb-rebuild-indexes)<a href="https://agentmods.dev/skills/stevegjones/ai-first-sdlc-practices/kb-rebuild-indexes"><img src="https://agentmods.dev/badge/skills/stevegjones/ai-first-sdlc-practices/kb-rebuild-indexes/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/stevegjones/ai-first-sdlc-practices/kb-rebuild-indexes"><img src="https://agentmods.dev/badge/skills/stevegjones/ai-first-sdlc-practices/kb-rebuild-indexes.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00061 | $0.02170 |
| Opus 5.5 | $0.00024 | $0.00868 |
| Sonnet 5.5 | $0.00012 | $0.00434 |
| Haiku 4.5 | $0.00006 | $0.00217 |
Grade A, and why
kb-rebuild-indexes scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 17d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 193 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Rebuild Knowledge Base Indexes
Script-based: This skill runs
build_shelf_index.pyvia 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.
-
--dry-run— Report what would change (including theScanned:/Excluded:breakdown) without writing_shelf-index.mdorlog.md. -
--force— Override the bulk-add safety rail (see "Safety rail" below). Never pass this on your own initiative — only after the user has seen the breakdown and confirmed.
Excluding directories: .kb-index-ignore
The rebuild indexes every .md file under the library, except the top-level raw/ directory (always excluded). To keep other directories out of the index — vendored dumps, scraped reference material, anything that is not a curated library file — create <library_path>/.kb-index-ignore:
# one library-relative directory per line
iso20022/
vendor/standards
- One directory path per line, relative to the library root; a trailing
/is optional. - A path matches that directory and everything under it. No globs.
#comments and blank lines are ignored.- Absolute paths and
..entries are rejected. An entry that matches nothing produces a warning.
Preflight
Verify the project has a knowledge base. The [Knowledge Base] section in CLAUDE.md should declare:
library_path— defaultlibrary/shelf_index_path— defaultlibrary/_shelf-index.md
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 17d ago Changed · +44 lines 98222c7a8ce1
- 1mo ago First seen · 149 lines · 61 tokens per session scan A 6679f44a84f5
kb-rebuild-indexes is a skill published in the GitHub repository SteveGJones/ai-first-sdlc-practices (41 stars, last pushed 15d ago), licensed MIT. It adds 61 tokens to every session and 2,170 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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