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-query)<a href="https://agentmods.dev/skills/stevegjones/ai-first-sdlc-practices/kb-query"><img src="https://agentmods.dev/badge/skills/stevegjones/ai-first-sdlc-practices/kb-query/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-query"><img src="https://agentmods.dev/badge/skills/stevegjones/ai-first-sdlc-practices/kb-query.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 | $0.00062 | $0.04501 |
| Opus 5.5 | $0.00025 | $0.01800 |
| Sonnet 5.5 | $0.00012 | $0.00900 |
| Haiku 4.5 | $0.00006 | $0.00450 |
Grade A, and why
kb-query 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 — 441 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Knowledge Base Query
Ask a question against the project's knowledge base. This is the query operation in the three-operations model (ingest / query / lint).
Argument
A natural-language question. Two forms:
- Retrieval: "What does our research say about X?" — returns specific findings with citations
- Synthesis: "Build me the case for X" or "How should we think about X?" — returns a connected argument across multiple findings with caveats
Optional flag:
--promote-to-library— after the librarian answers, file the answer back into the library as a new page viakb-promote-answer-to-library. Use when the answer is worth keeping for future queries.
Preflight
- Verify the
research-librarianagent is available. - Library availability and shelf-index presence are checked in Step 1 via the registry resolver — no manual path checks needed here.
Preflight: verify scripts package importable
Before running any subsequent step, verify the kb scripts package can be imported:
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.registry # noqa: F401
print('OK')
except ImportError:
print('MISSING')
"
If output is MISSING, prepend this preamble to every subsequent bash snippet in this skill:
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)
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 · +2 lines 39fda88641d7
- 1mo ago First seen · 439 lines · 62 tokens per session scan A 62ee995ecbbc
kb-query is a skill published in the GitHub repository SteveGJones/ai-first-sdlc-practices (41 stars, last pushed 15d ago), licensed MIT. It adds 62 tokens to every session and 4,501 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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