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 ikenga-hq/ikenga-pkgs --skill thunderbird-emailgit clone --depth 1 https://github.com/ikenga-hq/ikenga-pkgsWrote 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/ikenga-hq/ikenga-pkgs/thunderbird-email)<a href="https://agentmods.dev/skills/ikenga-hq/ikenga-pkgs/thunderbird-email"><img src="https://agentmods.dev/badge/skills/ikenga-hq/ikenga-pkgs/thunderbird-email/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/ikenga-hq/ikenga-pkgs/thunderbird-email"><img src="https://agentmods.dev/badge/skills/ikenga-hq/ikenga-pkgs/thunderbird-email.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 | $0.00101 | $0.02880 |
| Opus 5 | $0.00051 | $0.01440 |
| Sonnet 5 | $0.00020 | $0.00576 |
| Haiku 4.5 | $0.00010 | $0.00288 |
Grade A, and why
thunderbird-email 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.
How it starts
The opening of the file, as written. The whole thing — 309 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Thunderbird Email Skill
Access the user's local Thunderbird mail store. Two capabilities:
- Read (mbox) — search and extract emails from the local offline-store mbox files. Does not modify the store or sync IMAP.
- Write drafts (IMAP APPEND) — place a drafted reply into the user's Drafts folder by appending it to the IMAP server (see Writing drafts). This is the ONLY write path, and it goes to the server, never the local mbox. The skill does not send mail.
Profile path
Set TBIRD_PROFILE to your Thunderbird profile directory. Defaults vary
by OS:
| OS | Default profile location |
|---|---|
| Linux (snap) | ~/snap/thunderbird/common/.thunderbird/<profile-id>.default |
| Linux (apt) | ~/.thunderbird/<profile-id>.default-release |
| macOS | ~/Library/Thunderbird/Profiles/<profile-id>.default-release |
| Windows | %APPDATA%\Thunderbird\Profiles\<profile-id>.default-release |
Find your profile id by opening Thunderbird → Help → Troubleshooting Information → Profile Folder.
export TBIRD_PROFILE="$HOME/.thunderbird/abcd1234.default-release"
Account map
Each IMAP account lives under $TBIRD_PROFILE/ImapMail/<server-hostname>/.
List your servers with:
ls "$TBIRD_PROFILE/ImapMail/"
A typical layout, given an account [email protected] hosted at
mail.example.com:
| File | Purpose |
|---|---|
$TBIRD_PROFILE/ImapMail/mail.example.com/INBOX |
Top-level inbox mbox |
$TBIRD_PROFILE/ImapMail/mail.example.com/INBOX.sbd/Sent |
Sent folder |
$TBIRD_PROFILE/ImapMail/mail.example.com/INBOX.sbd/Drafts |
Drafts |
$TBIRD_PROFILE/ImapMail/mail.example.com/INBOX.sbd/<Label> |
Custom labels (Thunderbird subfolders) |
The .sbd suffix is Thunderbird's mail-store-directory convention — INBOX
itself is an mbox file, while its subfolders live under INBOX.sbd/.
File ordering
Thunderbird does NOT guarantee a fixed ordering inside mbox files. Different
servers/accounts may append at either end depending on IMAP sync direction
and history. When in doubt, parse the full file and sort by the Date:
header rather than relying on file order.
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 · 309 lines · 101 tokens per session scan A b82c736a7be3
thunderbird-email is a skill published in the GitHub repository ikenga-hq/ikenga-pkgs (0 stars, last pushed 2d ago), licensed Apache-2.0. It adds 101 tokens to every session and 2,880 once invoked, about $0.0005 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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