Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/paruff/ufawkesai/invocation-trackingnpx skills add paruff/uFawkesAI --skill invocation-trackinggit clone --depth 1 https://github.com/paruff/uFawkesAIWrote 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/paruff/ufawkesai/invocation-tracking)<a href="https://agentmods.dev/skills/paruff/ufawkesai/invocation-tracking"><img src="https://agentmods.dev/badge/skills/paruff/ufawkesai/invocation-tracking.svg" alt="Measured on agentmods" 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 | $0.00037 | $0.00547 |
| Opus 5 | $0.00018 | $0.00273 |
| Sonnet 5 | $0.00007 | $0.00109 |
| Haiku 4.5 | $0.00004 | $0.00055 |
Grade A, and why
agent-invocation-tracking 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.
How it starts
The opening of the file, as written. The whole thing — 64 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Skill: Agent Invocation Tracking
Load trigger:
"load agent-invocation-tracking skill"> DORA: Cap 2 (Observability) Token cost: Low
Purpose
Track when agents start, complete, and how long they take. Enables answering: "Which agents are used most? Which take longest? Which fail most often?"
Span Specification
agent.invocation.started
Emit when the agent begins processing.
Attributes:
| Attribute | Type | Description |
|---|---|---|
agent.name |
string | Agent identifier (matches filename without .md) |
session_id |
string | Unique invocation identifier |
mode |
string | Operational mode (if agent supports multiple) |
trigger |
string | What triggered this invocation (human request, CI, direct invocation) |
input_files |
string[] | Files read as context for this invocation |
agent.invocation.completed
Emit when the agent finishes.
Attributes (all from started, plus):
| Attribute | Type | Description |
|---|---|---|
duration_ms |
integer | Wall-clock duration in milliseconds |
total_skills_loaded |
integer | Count of skills loaded during invocation |
total_findings |
integer | Count of findings produced |
decision |
string | Final decision (PASS/FAIL/BLOCKED/APPROVE/REQUEST_CHANGES/ESCALATE) |
agent.invocation.failed
Emit when the agent encounters an error it cannot recover from.
Attributes (all from started, plus):
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.
- 4d ago First seen · 64 lines · 37 tokens per session scan A 5d7fb35b7fb9
agent-invocation-tracking is a skill published in the GitHub repository paruff/uFawkesAI (2 stars, last pushed 12d ago), licensed MIT. It adds 37 tokens to every session and 547 once invoked, about $0.0002 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 2026-08-31.
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