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Transactional Email · chunkydotdev | DecimalAI

devopsby chunkydotdev

Transactional Email

chunkydotdev/transactional-email

Source chunkydotdev/email-skills ↗License MIT

Design and send transactional emails.

SkillScore91Maintained

Automatic

DevOps & SRE pack

Last verified 8/6/2026

What it changes

Passed 20 of 22 test cases with the skill, and 17 of 22 without it.

Without skill77%

With skill91%

Checks it passed that the model alone missed

Specifies a 4-hour expiration TTL for account alert deduplication keys.
Specifies a maximum acceptable complaint rate target of under 0.01% for transactional emails.
Recommends creating a new versioned template before atomically switching the active template pointer.

3 fixed17 passed either way2 still failing0 broke

Pass-rate lift: +14 pp
Tokens: +193%
Agent turns: 0%
Response time: -30%

Model gemini-3.6-flashMeasured 8/6/2026v120 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/chunkydotdev-transactional-email/SKILL.md https://app.decimal.ai/s/chunkydotdev-transactional-email/SKILL.md

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

decimalai skills add chunkydotdev-transactional-email

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

curl -fsSL --create-dirs -o .claude/skills/chunkydotdev-transactional-email/SKILL.md https://app.decimal.ai/s/chunkydotdev-transactional-email/SKILL.md

Raw file: /s/chunkydotdev-transactional-email/SKILL.md ↗ · machine-readable summary at /s/chunkydotdev-transactional-email.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 3 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 3

Prompt

Our security operations center wants to establish alert thresholds for spam complaint rates on our transactional email stream (`mail.example.com`). What maximum complaint rate percentage indicates a critical anomaly on transactional streams?

What was checked, without and with the skill
Checked	Without skill	With skill
Specifies a maximum acceptable complaint rate target of under 0.01% for transactional emails.	Missed	Passed

case-09 · gemini-3.6-flash · 8/6/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md438 linessingle file

Transactional Email

Send receipts, auth codes, shipping notifications, and account alerts that arrive reliably and stay compliant.

When to use this skill

Building password reset, email verification, or two-factor auth flows
Sending order confirmations, receipts, or shipping notifications
Implementing account change alerts (password changed, new login, billing update)
Deciding whether a message qualifies as transactional or commercial
Separating transactional email infrastructure from marketing sends
Adding idempotency or deduplication to automated email triggers
Troubleshooting delayed delivery of time-sensitive messages

Related skills

domain-authentication - SPF, DKIM, DMARC setup required before sending anything
provider-setup - choosing and configuring an email provider
bounce-handling - processing hard/soft bounces and retry strategies
email-compliance - CAN-SPAM, GDPR, CASL, and unsubscribe requirements
template-design - HTML email templates that render everywhere
notification-design - product notification email patterns

What counts as transactional

The FTC's CAN-SPAM Act defines transactional email by its "primary purpose." A message is transactional if it:

Facilitates or confirms a transaction the recipient already agreed to - order confirmations, receipts, payment confirmations
Provides warranty, recall, safety, or security information about a product or service the recipient purchased
Notifies about changes to terms, features, or status of an ongoing commercial relationship - account updates, plan changes, TOS updates
Delivers account balance or usage information on a regular basis
Facilitates an ongoing transaction - shipping notifications, delivery updates, subscription renewals

Common transactional email types

Category	Examples	Time sensitivity
Authentication	Password resets, email verification, 2FA codes	Seconds

Track record

Benchmark

20 / 22

test cases passed, vs 17 / 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 — 8/2/2026

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

chunkydotdev / email-skills

skills/sending/transactional-email/SKILL.md

View on GitHub ↗

License MITImported 8/2/2026Version v1

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