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 skills add astra-sh/qvr --skill trace-skill-activitygit clone --depth 1 https://github.com/astra-sh/qvrWrote 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/astra-sh/qvr/trace-skill-activity)<a href="https://agentmods.dev/skills/astra-sh/qvr/trace-skill-activity"><img src="https://agentmods.dev/badge/skills/astra-sh/qvr/trace-skill-activity.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 5.1 | $0.00112 | $0.01275 |
| Opus 5 | $0.00056 | $0.00638 |
| Sonnet 5 | $0.00022 | $0.00255 |
| Haiku 4.5 | $0.00011 | $0.00128 |
Grade A, and why
trace-skill-activity 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 7d 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 — 127 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Trace skill activity with qvr audit
qvr audit records what your agents actually did — every turn, tool call, and
command — attributed to the skill that was active — into a local SQLite
database (~/.quiver/skillops.db). Agents already keep their own session
history on disk; qvr reads those native stores directly, so there is no agent
configuration to touch and months of existing history back-fill on the first
scan. The subsystem is experimental, opt-in, and disabled by default; its
command surface, storage format, and output shapes may change.
When to use this
- The user wants visibility into agent tool/file/command activity.
- They want to attribute actions to the skill that was active.
- They want to export traces for external analysis, replay, or archival.
This is observability only — it does not change what skills are installed (that's
onboard-skills) or verify their integrity (that's verify-skill-supply-chain).
How it works (two layers)
- Raw traces — the agent's own transcript lines, captured verbatim. This is
the source of truth (
qvr audit export,sessions show). - Derived projection — the unified per-session model (title, model,
turn/tool counts, skills) plus Turn / Tool / Skill spans projected from the
raw traces, as shown by
qvr audit sessionsandqvr audit logs. A deriver must exist for the agent (theDERIVEScolumn instatusreports this); only deriver-backed agents are scanned.
Workflow
1. Enable capture and discover your history
enable sets ops.enabled in config and creates the database. discover
scans every supported agent's native session store and records the
skill-using sessions it finds; sessions that provably used no skill are
counted but not stored (pass --keep-all to import everything).
qvr audit enable
qvr audit discover # scan every agent's session store
qvr audit discover --agent <agent> # scan a single agent
qvr audit discover --since 90d # bound the back-fill window
qvr audit discover --dry-run # report what would be scanned
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.
- 7d ago First seen · 127 lines · 112 tokens per session scan A 431309c1e72d
trace-skill-activity is a skill published in the GitHub repository astra-sh/qvr (23 stars, last pushed 2mo ago), licensed MIT. It adds 112 tokens to every session and 1,275 once invoked, about $0.0006 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 2026-08-30.
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