Email voice profile
Use this when the user asks you to learn how they write email — "learn my voice",
"build my email voice profile", "study my sent mail so you can draft for me" — or when
email-draft-in-voice needs a profile that doesn't exist yet.
Personal DMs only. Sent mail is private; refuse to run this from a channel or group
and offer to continue in the user's DM. The profile you produce lives in their personal
workspace, so only their own conversations can read it.
1. Pull the corpus
Use the selected email access skill to retrieve up to 300 of the user's sent messages.
Strip quoted replies and ---delimited signatures, drop automated and trivial messages,
and write one JSON line per email to voice/corpus/corpus.jsonl, tagged internal or
external by recipient domain. Record corpus stats; if fewer than ~50 usable emails
survive, tell the user the profile will be rough and ask whether to continue.
2. Study it
Read a deliberate spread, not just the top of the file: oldest and newest, internal
and external, one-liners and long emails. You are looking for what is distinctive —
patterns a generic professional emailer would not share.
Watch for a signature block: only ---delimited signatures are stripped, so a plain
signature (name / title / phone) survives at the end of many bodies. Treat a verbatim
recurring trailing block as the mail client's signature, not a chosen sign-off — note
it in the profile so drafts never include it (Gmail appends it on send).
3. Write the profile
Write voice/email-voice-profile.md in the workspace with exactly these sections,
every claim backed by observed frequency ("uses 'Best,' in 80% of external mail"),
with 2–3 verbatim example lines each:
- Register map — how tone shifts by audience (internal vs external, familiar vs
cold), and how their length tracks the situation.
- Openers & sign-offs — actual greetings and closings with rough frequencies,
including when they use none.
- Rhythm — sentence length, paragraph shape, how they open and end a body, use of
fragments, lists, links.
- Vocabulary & phrases — recurring words, pet phrases, how they hedge, how they say
yes and no.
- Punctuation & formatting quirks — dashes, ellipses, casing, emoji, bolding.
- Hard rules — things true of nearly every email ("never opens with 'I hope this
finds you well'", "always lowercase to teammates").
- Anti-patterns — what they never do, plus the generic-AI tells to avoid
(enthusiastic adjectives, "I'd be happy to", bullet-point answers to plain questions).
4. Validate before declaring done
Hold out 3 real threads the profile wasn't built from. For each, draft the user's
reply using only the profile, then compare with what they actually sent. Where the
real email diverges, tighten the profile — usually a missing hard rule or register
distinction. Record validated: <date> at the top of the profile once the drafts read
as plausibly theirs.
Show the user the finished profile and ask what feels wrong; their corrections go in
as hard rules. Re-run this skill any time they want it refreshed — it overwrites the
corpus and profile in place.