BF Session Audit
Session and cookie security auditor (OWASP A07:2021 — Identification and Authentication Failures). Scans Express/Koa/Fastify, Flask/Django/FastAPI, Go net/http, Spring Boot, and Rails source code for 10 session management weaknesses — missing HttpOnly/Secure/SameSite cookie flags, session token in URL, session fixation (no regenerate after login), missing CSRF protection, session data in localStorage, missing session timeout, weak session ID generation, and overly broad cookie domain scope. Zero external dependencies. CI fail-gate included.
As a process F 26/100 · Will not run — References files that are not bundled: ?:token|session_id|auth|session|access_token, ?:token|session|auth
How to improve
- Say in the description WHEN to use the skill ("use when…", example requests): that is the agent's main cue.
- The SKILL.md body is over 5,000 tokens: move reference detail into references/ and load it when needed.
- The text references files that are not there: add them or drop the references.
- Your own cases (evals/evals.json, 4–6 real requests with expected answers): the full check would then run those instead of a model-drafted suite.
- A spec.yaml with trigger phrases and assertions — a behaviour contract for CI; `skilltest init` writes a template.
Guard findings · 0
✓ No critical or high findings
Files scanned: 2. Evidence is masked. Grey chips explain why severity was lowered.
Against the Agent Skills spec
- warning
name-formatname should be kebab-case (lowercase letters, digits, hyphens) - warning
description-no-whendescription does not say WHEN to use the skill (no "use when") - warning
body-longSKILL.md body ≈ 7556 tokens (recommended < 5000); move details to references/ - warning
missing-refreference to a missing file: ?:token|session_id|auth|session|access_token - warning
missing-refreference to a missing file: ?:token|session|auth - note
frontmatter-keyunknown frontmatter key "homepage"
Process rating: all ten parameters 26/100
- 0Tools and files. 2 referenced file(s) missing: ?:token|session_id|auth|session|access_token, ?:token|session|auth
- 0Result and completion. Does not say what the result is
- 0Inputs and preconditions. Does not say what the process needs to start
- 0Failures and branches. Linear process with no failure handling
- 0Progress reporting. Says nothing while it works
- 20When it triggers. No condition that starts the skill
- 30Running it twice. 3 mutating operations with no state check
- 40Consistency. Frontmatter name (Session Audit) differs from the folder (phy-session-audit)
- 70Execution cost. Instruction body is 7556 tokens
- 100Steps. 10 steps
Everything here is measured from the skill text rather than judged by a model, so the numbers are checkable. A parameter weighs more when it is a more common reason for the process to stall.
Quality signals
- +5Description has no quoted example phrases that should trigger the skill
- +4Description does not say when NOT to use the skill (false activations)
- +3Output format is not stated: the model decides each time
- +2Single-language instructions
- +3Description length 546: enough signal without eating the budget
- +4Structure: 20 headings
- +3Step-by-step instructions: 10 items
- +4Has examples (4 code blocks)
- +1License stated
Quality base 70; lint remarks subtract, signals add up to 100. Result: 48.