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/silo-code/silo/verifier-guinpx skills add silo-code/silo --skill verifier-guigit clone --depth 1 https://github.com/silo-code/siloWhat 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 | $0.00097 | $0.04573 |
| Opus 5 | $0.00048 | $0.02286 |
| Sonnet 5 | $0.00019 | $0.00915 |
| Haiku 4.5 | $0.00010 | $0.00457 |
Grade C, and why
verifier-gui scanned grade C with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Recursive force deletehighDestructive command
rm -rf with a variable or a broad path is one typo away from removing the wrong tree.
rm -rf "$WS_DIR" Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
`Bash` call.** The `silo()` helper is just `curl`; bash variables (`WS_ID`, How it starts
The opening of the file, as written. The whole thing — 305 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Silo GUI Verifier
The handle the verify skill looks for: how to get the running Silo app under
control and capture evidence from it. Silo is a Tauri desktop app; its surface is
pixels + a dev-only RPC bridge. This skill drives that bridge.
It does not judge. It launches, drives, captures. The verdict is verify's.
Golden rule 1: verify in a sandbox workspace, never the user's
The app may be the user's live session with real workspaces and terminals. Do
all verification in a workspace you create from a temp dir, and delete it when
done. Never openTerminal/deleteWorkspace/openFile against an existing
workspace — you'd pollute or destroy real state. Create → activate → verify →
delete. This also makes destructive paths (workspace delete, session kill) safe
to exercise.
Golden rule 2: one turn, not one op per turn
The wall-clock cost here is agent turns, not the RPC bridge — each bridge call
is ~milliseconds on localhost, but every separate Bash tool call is a full model
round-trip (seconds). So issue a whole drive + capture sequence as a single
Bash call. The silo() helper is just curl; bash variables (WS_ID,
WS_DIR) persist within one invocation, so create → activate → drive →
screenshot → decode all belong in one block (see §2). A 6-step flow then costs
2 turns, not 7.
Only split into a separate turn when you genuinely must:
- The final
Read /tmp/silo.png—Readis its own tool, so capture-in-one-turn then read-in-the-next is the floor (2 turns). - Branching on an observed result — if the next op depends on what you saw (a count, a tab list, a pass/fail), end the block, read the output, then decide. A fixed setup sequence has no such dependency — never split it.
Echo any state you'll need next turn (e.g. echo "WS_ID=$WS_ID") — bash vars die
at the end of the Bash call.
1. Get the app up (attach or launch)
The bridge listens on 127.0.0.1:7878 (dev builds only — app:dev is built
--features automation). Define the request helper first — the contract is
strict: header X-Silo-Automation: 1 and a loopback Host, POST /, body
{"op", "args"}.
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.
- 2d ago First seen · 305 lines · 97 tokens per session scan C 8865ae751fb5
verifier-gui is a skill published in the GitHub repository silo-code/silo (53 stars, last pushed 2d ago), licensed MIT. It adds 97 tokens to every session and 4,573 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it C with 2 findings (recursive force delete, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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agtx-research
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