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wacli · understudy-ai | DecimalAI

productivityby understudy-ai

wacli

understudy-ai/wacli

Source understudy-ai/understudy ↗License MIT

Send WhatsApp messages to other people or search/sync WhatsApp history via the wacli CLI (not for normal user chats).

SkillScore82Maintained

Automatic

Personal Assistant pack

Last verified 8/19/2026

What it changes

Passed 15 of 18 test cases with the skill, and 3 of 18 without it.

Without skill18%

With skill82%

Checks it passed that the model alone missed

Uses wacli auth
Uses wacli doctor
Refers to ~/.wacli

and 20 more in the full report

14 fixed4 passed either way4 still failing0 broke

Pass-rate lift: +64 pp
Tokens: -23%
Agent turns: 0%
Response time: -54%

Model gemini-3.6-flashMeasured 8/19/2026v118 of 22 cases passed with skill · 18 comparable

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-wacli/SKILL.md https://app.decimal.ai/s/understudy-ai-wacli/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add understudy-ai-wacli, 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-wacli/ and pins it in .decimal/skills.lock

decimalai skills add understudy-ai-wacli

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

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

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

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 14 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 14

Prompt

Message John at +15559990000 on WhatsApp regarding the update.

What was checked, without and with the skill
Checked	Without skill	With skill
Asks a clarifying question regarding the exact message content	Missed	Passed

case-15 · 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.md41 linessingle file

wacli

Use wacli only when the user explicitly asks you to message someone else on WhatsApp or when they ask to sync/search WhatsApp history. Do NOT use wacli for normal user chats; Understudy routes WhatsApp conversations automatically. If the user is chatting with you on WhatsApp, you should not reach for this tool unless they ask you to contact a third party.

Safety

Require explicit recipient + message text.
Confirm recipient + message before sending.
If anything is ambiguous, ask a clarifying question.

Auth + sync

wacli auth (QR login + initial sync)
wacli sync --follow (continuous sync)
wacli doctor

Find chats + messages

wacli chats list --limit 20 --query "name or number"
wacli messages search "query" --limit 20 --chat <jid>
wacli messages search "invoice" --after 2025-01-01 --before 2025-12-31

History backfill

wacli history backfill --chat <jid> --requests 2 --count 50

Send

Text: wacli send text --to "+14155551212" --message "Hello! Are you free at 3pm?"
Group: wacli send text --to "[email protected]" --message "Running 5 min late."
File: wacli send file --to "+14155551212" --file /path/agenda.pdf --caption "Agenda"

Notes

Store dir: ~/.wacli (override with --store).
Use --json for machine-readable output when parsing.
Backfill requires your phone online; results are best-effort.
WhatsApp CLI is not needed for routine user chats; it’s for messaging other people.

Track record

Benchmark

15 / 18

test cases passed, vs 3 / 18 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/wacli/SKILL.md

View on GitHub ↗

License MITImported 8/3/2026Version v1

Other skills for the same job

Published skills whose descriptions closely match this one, with their headline benchmark lift.

More skills from the same source and nearby in the registry, with their headline benchmark lift.

Ready to supercharge your AI agents?

See it in action

What's inside

wacli

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

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