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 commands/open-agent-tools/postcard/replygit clone --depth 1 https://github.com/Open-Agent-Tools/PostcardWhat 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 | $0.00014 | $0.00117 |
| Opus 5 | $0.00007 | $0.00059 |
| Sonnet 5 | $0.00003 | $0.00023 |
| Haiku 4.5 | $0.00001 | $0.00012 |
Grade A, and why
reply 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 yesterday.
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.
What it actually says
Run: oat-postcard reply $ARGUMENTS
Recipient is the parent postcard's sender. Title is
"Re: <parent-title>" (truncated to 140 chars). The new postcard
records reply_to: <parent-id> so threading is queryable and the
receiving session can see this is a direct response to something
they sent.
Body ≤1400 chars, plain text only.
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.
- yesterday First seen · 15 lines · 14 tokens per session scan A 98ee51bd3b11
reply is a command published in the GitHub repository Open-Agent-Tools/Postcard (2 stars, last pushed 22d ago), licensed MIT. It adds 14 tokens to every session and 117 once invoked, about $0.0001 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.
Other commands, from other repositories
template
Manage issue templates for streamlined issue creation.
design-review
Workflow recipe — review a design end-to-end, ending in measured numbers rather than adjectives, by chaining 4 skills.
setup-pm-skills
Onboard a new user — find out what they do, recommend the right bundles & top skills, and set up a project CONTEXT.md so every skill is tailored to them.
security-review
CWE 기반 보안 검토 + STRIDE 위협 모델링 (v6 - effort:max 강제).
auto-browse
Auto-browse — learn, optimize, and graduate browser operations or web data-mining workflows.
release-harn
Run the tag-first Harn release workflow.