inspect-bdd-steps

inspect-bdd-steps is a skill for Claude Code from prebid/salesagent. It costs 86 tokens per session (539 once invoked), scanned A, original, Apache-2.0.

An inspector for BDD step definitions. BDD, or behavior-driven development, describes software behavior in readable Given, When, and Then steps; this tool checks whether Then steps actually verify what their text promises.

In plain words
What is it for?
Use it after writing or changing BDD tests to review assertions, trace flagged steps through the production code, and create an audit report.
Why use it?
It finds checks that only appear to test a result but are too weak, incomplete, or disconnected from the application's real behavior.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

Not installable on its own: it runs a file from its repository that does not travel with it. Clone the repository, or install whatever ships that file. The line is python3 .claude/scripts/inspect_bdd_steps.py.

Install

Getting it into your agent

There is no command for this one: it runs only inside a plugin, and the catalogue could not identify which plugin ships it. The source is linked below.

Made for: Claude Code.

Wrote 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.

agentmods badge for inspect-bdd-steps

README.md
[![agentmods](https://agentmods.dev/badge/skills/prebid/salesagent/inspect-bdd-steps.svg)](https://agentmods.dev/skills/prebid/salesagent/inspect-bdd-steps)
Your own site
<a href="https://agentmods.dev/skills/prebid/salesagent/inspect-bdd-steps"><img src="https://agentmods.dev/badge/skills/prebid/salesagent/inspect-bdd-steps.svg" alt="Measured on agentmods" height="20"></a>
Per session 86 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 539 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00086 $0.00539
Opus 5 $0.00043 $0.00269
Sonnet 5 $0.00017 $0.00108
Haiku 4.5 $0.00009 $0.00054

Measured 4d ago against content hash d017b0af7fde, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

inspect-bdd-steps 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 4d 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.

.claude/skills/inspect-bdd-steps/SKILL.md · 62 lines

What it actually says

BDD Step Assertion Completeness Inspector

Inspects every BDD step function for semantic completeness: does the function body actually implement what the step text claims?

Usage

/inspect-bdd-steps
/inspect-bdd-steps --pass1-only

What It Does

  1. AST scan: Extracts all @given/@when/@then decorated functions from tests/bdd/steps/
  2. Pass 1 (Sonnet triage): For each Then step, asks: "Is there a HIGH chance this function does NOT implement what the step text claims?"
    • PASS: Function plausibly implements its claim
    • FLAG: Function likely doesn't (pass body, truthiness-only check, etc.)
  3. Pass 2 (Opus deep trace): For each FLAG, collects production context (schemas, error classes, harness code) and asks Opus to make an architectural judgment about what the correct assertion should be.
  4. Report: Writes .claude/reports/bdd-step-audit-<date>.md with findings grouped by severity (MISSING > WEAK > COSMETIC).

Protocol

Run the inspection script:

python3 .claude/scripts/inspect_bdd_steps.py

Options:

  • --pass1-only — Skip Pass 2 deep trace (fast triage only)
  • --steps-dir PATH — Override step definitions directory
  • --output PATH — Override report output path
  • --then-only — Only inspect Then steps (default: true)

Review the generated report and use findings to inform beads-58u (assertion mismatch fixes) or create new tasks.

When to Use

  • After writing new BDD step definitions
  • After modifying existing step assertions
  • As a periodic audit (monthly or per-epic)
  • Before closing BDD-related PRs
Changes

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.

  1. 4d ago First seen · 62 lines · 86 tokens per session scan A d017b0af7fde

Subscribe to this mod's changes

inspect-bdd-steps is a skill published in the GitHub repository prebid/salesagent (37 stars, last pushed yesterday), licensed Apache-2.0. It adds 86 tokens to every session and 539 once invoked, about $0.0004 per session on Opus 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 2026-09-01.

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