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Himalaya Email CLI · understudy-ai | DecimalAI

productivityby understudy-ai

Himalaya Email CLI

understudy-ai/himalaya

Source understudy-ai/understudy ↗License MIT

CLI to manage emails via IMAP/SMTP. Use `himalaya` to list, read, write, reply, forward, search, and organize emails from the terminal. Supports multiple accounts and message composition with MML (MIME Meta Language).

SkillScore95Maintained

Automatic

Personal Assistant pack

Last verified 8/19/2026

What it changes

Passed 21 of 22 test cases with the skill, and 14 of 22 without it.

Without skill64%

With skill95%

Checks it passed that the model alone missed

The command includes the --full option
The command uses himalaya message export 42
The command uses himalaya message move 42 "Archive"

and 6 more in the full report

7 fixed14 passed either way1 still failing0 broke

Pass-rate lift: +32 pp
Tokens: +35%
Agent turns: 0%
Response time: -49%

Model gemini-3.6-flashMeasured 8/19/2026v121 of 22 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/understudy-ai-himalaya/SKILL.md https://app.decimal.ai/s/understudy-ai-himalaya/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add understudy-ai-himalaya, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/understudy-ai-himalaya/ and pins it in .decimal/skills.lock

decimalai skills add understudy-ai-himalaya

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/understudy-ai-himalaya/SKILL.md https://app.decimal.ai/s/understudy-ai-himalaya/SKILL.md

Raw file: /s/understudy-ai-himalaya/SKILL.md ↗ · machine-readable summary at /s/understudy-ai-himalaya.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 7 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 7

Prompt

How do I relocate message 42 from my INBOX to a folder named 'Archive' using Himalaya? Show the command.

What was checked, without and with the skill
Checked	Without skill	With skill
The command uses himalaya message move 42 "Archive"	Missed	Passed

case-10 · gemini-3.6-flash · 8/19/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md233 lines3 files

Himalaya Email CLI

Himalaya is a CLI email client that lets you manage emails from the terminal using IMAP, SMTP, Notmuch, or Sendmail backends.

References

references/configuration.md (config file setup + IMAP/SMTP authentication)
references/message-composition.md (MML syntax for composing emails)

Prerequisites

Himalaya CLI installed (himalaya --version to verify)
A configuration file at ~/.config/himalaya/config.toml
IMAP/SMTP credentials configured (password stored securely)

Configuration Setup

Run the interactive wizard to set up an account:

himalaya account configure

Or create ~/.config/himalaya/config.toml manually:

[accounts.personal]
email = "[email protected]"
display-name = "Your Name"
default = true

backend.type = "imap"
backend.host = "imap.example.com"
backend.port = 993
backend.encryption.type = "tls"
backend.login = "[email protected]"
backend.auth.type = "password"
backend.auth.cmd = "pass show email/imap"  # or use keyring

message.send.backend.type = "smtp"

Track record

Benchmark

21 / 22

test cases passed, vs 14 / 22 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

understudy-ai / understudy

skills/himalaya/SKILL.md

View on GitHub ↗

License MITImported 8/3/2026Version v1Bundled 2 files

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Ready to supercharge your AI agents?

See it in action

What's inside

Himalaya Email CLI

References

Prerequisites

Configuration Setup

Track record

Benchmark

Adoption

SkillSafety

Source

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