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Transaction Scan · cowork-os | DecimalAI

financeby cowork-os

Transaction Scan

cowork-os/usecase-transaction-scan

Source cowork-os/cowork-os ↗License MIT

Scan recent messages/emails for card transactions and flag suspicious charges.

SkillScore77Maintained

Automatic

Finance & Accounting pack

Last verified 8/20/2026

What it changes

Passed 16 of 21 test cases with the skill, and 8 of 21 without it.

Without skill36%

With skill77%

Checks it passed that the model alone missed

Limits evaluation to 100 chat messages.
Limits message scanning to 10 recent items.
Executes the scan across the 7-day time window.

and 14 more in the full report

10 fixed7 passed either way4 still failing1 broke

Pass-rate lift: +41 pp
Tokens: +8%
Agent turns: 0%
Response time: -26%

Model gemini-3.6-flashMeasured 8/20/2026v1 · latest is v217 of 22 cases passed with skill · 21 comparable

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

This benchmark measured an earlier version of the skill.

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/cowork-os-usecase-transaction-scan/SKILL.md https://app.decimal.ai/s/cowork-os-usecase-transaction-scan/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add cowork-os-usecase-transaction-scan, 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/cowork-os-usecase-transaction-scan/ and pins it in .decimal/skills.lock

decimalai skills add cowork-os-usecase-transaction-scan

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

curl -fsSL --create-dirs -o .claude/skills/cowork-os-usecase-transaction-scan/SKILL.md https://app.decimal.ai/s/cowork-os-usecase-transaction-scan/SKILL.md

Raw file: /s/cowork-os-usecase-transaction-scan/SKILL.md ↗ · machine-readable summary at /s/cowork-os-usecase-transaction-scan.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 9 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 9

Prompt

Examine my email alerts for TD Bank debit transactions from the last 24h. Do not just list generic card security tips; perform the transaction scan and deliver findings with concrete action steps.

What was checked, without and with the skill
Checked	Without skill	With skill
Delivers transaction scan findings from the email feed for TD Bank.	Missed	Passed
Includes concrete action steps for flagged debit charges.	Missed	Passed

case-20 · gemini-3.6-flash · 8/20/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md43 linessingle file

Transaction Scan

Purpose

Scan recent messages/emails for card transactions and flag suspicious charges.

Routing

Use when: Use when the user asks to scan recent messages/emails for card transactions and flag suspicious charges.
Do not use when: Do not use when the request is asking for planning documents, high-level strategy, or non-executable discussion; use the relevant planning or design workflow instead.
Outputs: Outcome from Transaction Scan: task-specific result plus concrete action notes.
Success criteria: Returns concrete actions and decisions matching the requested task, with no fabricated tool-side behavior.

Trigger Examples

Positive

Use the usecase-transaction-scan skill for this request.
Help me with transaction scan.
Use when the user asks to scan recent messages/emails for card transactions and flag suspicious charges.
Transaction Scan: provide an actionable result.

Negative

Do not use when the request is asking for planning documents, high-level strategy, or non-executable discussion; use the relevant planning or design workflow instead.
Do not use usecase-transaction-scan for unrelated requests.
This request is outside transaction scan scope.
This is conceptual discussion only; no tool workflow is needed.

Parameters

Name	Type	Required	Description
channel	select	Yes	Where transaction alerts arrive
chat_hint	string	No	Issuer/merchant keyword to identify the feed (e.g., "Amex", "Wise", "Chase")
since	string	No	Time window (e.g., "24h", "7d")
message_limit	number	No	How many messages to fetch
amount_threshold	number	No	Flag transactions at or above this amount

Runtime Prompt

Track record

Benchmark

16 / 21

test cases passed, vs 8 / 21 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 v5 — 9/25/2026

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

cowork-os / cowork-os

resources/skills/usecase-transaction-scan/SKILL.md

View on GitHub ↗

License MITImported 9/25/2026Version v2

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

Transaction Scan

Purpose

Routing

Trigger Examples

Positive

Negative

Parameters

Runtime Prompt

Track record

Benchmark

Adoption

SkillSafety

Source

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