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Trajectory Audit

Category: Content  ·  Sub-category: content-misc  ·  Last updated:
type:audit
Sweep recent Claude Code session transcripts (.jsonl) for token-weighted cost/efficiency problems visible only across runs — machine-wide input:output ratio, prompt-cache / KV reuse, per-session distributions (tool calls, I:O, cache-hit, read-only fraction), the global tool mix, and the heaviest sessions by output tokens — plus the behavioral stuck/churn lens (#2365): per-tool error rates, shell timeout kills, foreground sleep-polls, Edit/Write read-discipline churn, repeated identical failure signatures, and per-file mutation churn. Wraps the project's auditor `tools/session_audit.py` (EXACT token accounting from the transcript usage records). Use when the operator says "audit recent claude trajectories/chats/sessions", "where is the token/cost going", "what are the heaviest sessions", "which sessions are stuck/looping/churning", or wants cross-session efficiency or behavior numbers. Read-only — emits a dated report, never edits code.
Security AStatic scan found no risk patternsHow grading works ›

About this skill (catalog notes)

Trajectory Audit includes pricing or quota commentary; at least one code block. The SKILL.md runs to about 1,342 words, in the catalog's typical mid-range.

Source
anthony-chaudhary.github.io/fak/showcase.html
License
Apache-2.0
Original author
anthony-chaudhary
Indexed lastmod
Catalog position
Content · content-misc
Indexed related skills
10

How Trajectory Audit fits the catalog

Trajectory Audit sits in the Content category under the content-misc sub-topic in the ClaudSkills catalog. There are 10 related skills indexed alongside it; comparing a few before installing usually reveals which fits your workflow best.

Is Trajectory Audit safe to install?

A free static scan against the OWASP Agentic Skills Top 10 found no risk patterns in Trajectory Audit’s SKILL.md — no data-exfiltration, prompt-injection, or unexpected-execution signatures. The full security scan is below.

Installing & verifying

Installing Trajectory Audit writes its SKILL.md to ~/.claude/skills/trajectory-audit/SKILL.md; Claude Code discovers it automatically on the next session — no restart flag needed. It declares no allowed-tools restriction, so it inherits your session’s existing tool access rather than narrowing it. To confirm it loaded, ask Claude to list its available skills — trajectory-audit should appear by name.

What Trajectory Audit needs to run

External services
The SKILL.md references pricing, quota, or rate limits — it likely calls a paid or rate-limited API. Check the source before wiring it into unattended automation.
Worked code
2 copy-paste code blocks in the body.
Depth
~1,342 words, typical mid-range depth.

When to reach for it

There are 10 related skills in Content — a two-minute scan of the alternatives usually confirms whether Trajectory Audit is the right pick.

These notes are auto-generated from features detected in the SKILL.md file and from this catalog's structure — they aren't part of the source repository.

From the source SKILL.md

Reads the most recent Claude Code session transcripts and rolls up what only shows up across many runs: where the tokens and cost actually went, how much of the ingested context was prompt-cache reuse vs fresh billed input, and which sessions were the expensive ones. The transcripts carry EXACT token accounting (message.usage), so every number here is ground truth — only the cost line uses an assumed price table (flagged in the output; edit PRICING in the tool).

What this skill does

Trajectory Audit is a community-contributed Claude Code skill in the content-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/trajectory-audit/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when the operator says "audit recent claude trajectories/chats/sessions", "where is the token/cost going", "what are the heaviest sessions", "which sessions are stuck/looping/churning", or wants cross-session efficiency or behavior numbers. Read-only — emits a dated report, never edits code.

Who uses this skill

The Trajectory Audit Claude Code skill is built for content creators, marketers, copywriters, SEO professionals, and editorial teams. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 178,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/trajectory-audit
curl -L https://claudskills.com/skills/trajectory-audit/SKILL.md \
  -o ~/.claude/skills/trajectory-audit/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/trajectory-audit/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/trajectory-audit/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\trajectory-audit\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Telegram

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Trajectory Audit Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/trajectory-audit/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the Trajectory Audit skill do?
Sweep recent Claude Code session transcripts (.jsonl) for token-weighted cost/efficiency problems visible only across runs — machine-wide input:output ratio, prompt-cache / KV reuse, per-session distributions (tool calls, I:O, cache-hit, read-only fraction), the global tool mix, and the heaviest sessions by output tokens — plus the behavioral stuck/churn lens (#2365): per-tool error rates, shell timeout kills, foreground sleep-polls, Edit/Write read-discipline churn, repeated identical failure signatures, and per-file mutation churn. Wraps the project's auditor `tools/session_audit.py` (EXACT token accounting from the transcript usage records). Use when the operator says "audit recent claude trajectories/chats/sessions", "where is the token/cost going", "what are the heaviest sessions", "which sessions are stuck/looping/churning", or wants cross-session efficiency or behavior numbers. Read-only — emits a dated report, never edits code.
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the Trajectory Audit skill?
Use Trajectory Audit when your Claude Code task falls under the Content category — specifically in the content misc area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Trajectory Audit" or describe the task and let Claude pick). Browse related skills at /category/content/.
What is a Claude Code skill and how does the Trajectory Audit skill fit in?
A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Trajectory Audit is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Content category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA
anthony-chaudhary. (2026). Trajectory Audit [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/trajectory-audit/
BibTeX
@misc{trajectory-audit-2026,
  author    = {anthony-chaudhary},
  title     = {Trajectory Audit [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/trajectory-audit/}
}

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Security scan

Grade A · scanned 2026-08-08 — free static scan against the OWASP Agentic Skills Top 10.

No risk patterns were found in any of the ten OWASP-aligned categories. How grading works ›

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[![Security: A](https://img.shields.io/badge/Security-A-2e7d32)](https://claudskills.com/skills/trajectory-audit/#security)

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