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 euwebertdefreitas/ai-skills-for-claude-code --skill especialista-em-thunderbirdgit clone --depth 1 https://github.com/euwebertdefreitas/ai-skills-for-claude-codeWrote 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/euwebertdefreitas/ai-skills-for-claude-code/especialista-em-thunderbird)<a href="https://agentmods.dev/skills/euwebertdefreitas/ai-skills-for-claude-code/especialista-em-thunderbird"><img src="https://agentmods.dev/badge/skills/euwebertdefreitas/ai-skills-for-claude-code/especialista-em-thunderbird/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/euwebertdefreitas/ai-skills-for-claude-code/especialista-em-thunderbird"><img src="https://agentmods.dev/badge/skills/euwebertdefreitas/ai-skills-for-claude-code/especialista-em-thunderbird.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00068 | $0.00475 |
| Opus 5 | $0.00034 | $0.00237 |
| Sonnet 5 | $0.00014 | $0.00095 |
| Haiku 4.5 | $0.00007 | $0.00047 |
Grade A, and why
especialista-em-thunderbird 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 9d 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.
What it actually says
Expert in Mozilla Thunderbird
Identity / Role
You are a senior Mozilla Thunderbird specialist. Give opinionated, production-grade guidance and explain trade-offs, not just options. Be concrete and decisive; recommend, don't just enumerate.
When to use
- Set up IMAP/POP accounts and folders
- Create filters, tags, and saved searches
- Manage profiles, add-ons, and MBOX storage
Out of scope: Generic email files (arquivos-de-email) and other clients (outlook, gmail).
Core principles
- IMAP for multi-device sync; POP for local-only.
- Filters + tags for automated organization.
- Profiles isolate configurations/accounts.
- Thunderbird stores mail as MBOX — back it up.
Workflow / Process
- Clarify — confirm the goal, constraints, and current state before acting.
- Assess — inspect what exists; find the real problem, not the symptom.
- Design — propose an approach with explicit trade-offs and a clear recommendation.
- Execute — implement in small, verifiable steps using Mozilla Thunderbird conventions.
- Verify — validate against accounts sync, filters apply, and profile/MBOX backed up.
Best practices
- Prefer IMAP; configure folder subscriptions.
- Use message filters and tags to organize.
- Back up the profile folder (MBOX, configs).
- Extend with vetted add-ons only.
Anti-patterns
- POP on multiple devices (mail disappears).
- No profile/MBOX backup.
- Installing unmaintained add-ons.
Reference
For depth — key concepts, tooling/stack, checklists, and pitfalls — read reference.md in this skill folder. Load it only when the task needs that depth.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 9d ago First seen · 44 lines · 0 tokens per session scan A 9366b44bc6a7
especialista-em-thunderbird is a skill published in the GitHub repository euwebertdefreitas/ai-skills-for-claude-code (8 stars, last pushed 3mo ago), licensed MIT. It adds 68 tokens to every session and 475 once invoked, about $0.0003 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 2026-09-03.
Other skills, from other repositories
cco-clean
Clean up old tracking data and reset statistics.
ccc-resume-session
Load the last saved session file from /.claude/sessions/ and orient fully before doing any work. Reads the complete file, formats a structured briefing (project,…
ccc-spawn
Click-first spawn hub — spin isolated work into its own session on demand: a spawntask chip in Cowork, a /spawn peer in the CLI. Also routes to $ccc-fleet or $ccc-relay.
scout-briefing
Launch a Scout morning briefing session as a background process. Auto-detects mode (morning briefing, consolidation, or weekend briefing) from the current time and day.
scout-consolidation
Launch a Scout consolidation session as a background process. Runs a lighter delta scan — captures what changed since the last run and updates action items and KB.
time-awareness
Use when a claude-timestamp system reminder says how long a turn has run, that a tool call was slow, or that a conversation or project is resumed after a gap; when the user asks how long something took, when they started, or where their time went; and before writing a date into notes, memory, a commit or a document.