Letter
Produce a formal letter as a single HTML document sized for A4 or US Letter.
Variant & tone
Variants: cover / resignation / recommendation / outreach / memo / thank-you. Default: outreach.
Tone axis: warm / neutral / strictly formal. Default: neutral leaning formal. Warm letters use contractions; formal letters don't.
Default paper: Letter (North American audience) or A4 otherwise. Signature space reserved by default.
Structure
Order is fixed. Keep blocks visually distinct via whitespace, not borders.
| Block |
Contents |
Length |
| Letterhead / Sender |
Name, address, email/phone, optional logo. Top. |
3–5 lines |
| Date |
Pick April 23, 2026 or 23 April 2026; hold |
1 line |
| Recipient |
Name, title, organization, address |
3–5 lines |
| Subject |
Re: [short description] — formal / memo only |
1 line |
| Salutation |
Dear [name], — surname for formal, first name for warm |
1 line |
| Body |
2–4 paragraphs. Paragraph 1 = purpose. Final paragraph = ask. |
Fills page |
| Sign-off |
Sincerely, / Best regards, / Warmly, — match tone |
1 line |
| Signature block |
~3 blank lines (wet signature if requested) → printed name → title |
4–6 lines |
| Enclosures |
Enclosures: Resume, Portfolio — only if attaching |
1 line |
Writing rules
- Open with purpose. Paragraph 1, sentence 1, states why you are writing. No warm-up prose.
- Close with the ask. The final paragraph names a specific action (reply by date, meeting, reference check, acceptance).
- One idea per paragraph. Split if two.
- Specific, not ornate. "…the Staff Engineer role posted April 14" beats "…the aforementioned position."
- No archaic phrasing. Drop "kindly find enclosed," "I trust this letter finds you well," "as per our previous correspondence."
- Active voice. "I managed the migration" beats "the migration was managed by me."
- Consistent names and dates throughout.
Source & material
Letters break on one wrong name, title, or date.
- No inferred recipients. Don't guess titles, salutations, or addresses.
- No fabricated references — case IDs, dates, reference numbers, prior correspondence.
- Required items present: sender full name, ≥1 sender contact, recipient name, date, specific purpose, recipient title/org (formal variants). If missing, produce a gap table and ask once.
Distill raw input
Skip if the input is already a drafted letter or a clear brief (purpose + ask + supporting points).
If raw (bullet list, transcript, chat log):
- Extract purpose, supporting points, requested action, and facts (names, dates, refs).
- Classify into Opening / Body / Close.
- Gap-check — explicit purpose? explicit ask? If either missing, ask.
- Ask once with a compact gap table.
Form-specific verification
Beyond done + fork_verifier_agent:
- One page at chosen paper size. Print preview confirms.
- Facts — every name, date, title, address matches source material.
- Paragraph 1 states purpose. Final paragraph states the ask.
- Salutation matches recipient block — same name, correct title.
- Signature space preserved if wet signature requested — ≥ 3 lines tall, prints that way.
- Date format consistent — header and any body references use the same form.
Feedback protocol
| User says |
Ask |
| "too formal" |
Tone axis is currently [X]. Shift to [Y] — swap salutation, add contractions, loosen sign-off? |
| "too casual" |
Same axes, reversed. |
| "doesn't land" |
Opening sentence says "[quote]." Tighten to [option A] or sharpen the ask [option B]? |
| "signature looks wrong" |
Signature block is [N lines, aligned X]. Shift to [new form]? |
| "feels cramped" |
Paragraph spacing is X. Loosen to Y, or cut one paragraph? |
Never say "I'll adjust the tone" without naming the exact change and its new form.
When not to use
- Multi-page proposal letters, legal briefs → long-document skill.
- Email → different medium; extract the body for an email client.
- Marketing / promotional copy in letter form →
one-pager.
1---2name: letter3description: Letter4---5# Letter67Produce a formal letter as a single HTML document sized for A4 or US Letter.89## Variant & tone1011Variants: cover / resignation / recommendation / outreach / memo / thank-you. Default: outreach.1213Tone axis: warm / neutral / strictly formal. Default: neutral leaning formal. Warm letters use contractions; formal letters don't.1415Default paper: Letter (North American audience) or A4 otherwise. Signature space reserved by default.1617## Structure1819Order is fixed. Keep blocks visually distinct via whitespace, not borders.2021| Block | Contents | Length |22|---|---|---|23| **Letterhead / Sender** | Name, address, email/phone, optional logo. Top. | 3–5 lines |24| **Date** | Pick `April 23, 2026` or `23 April 2026`; hold | 1 line |25| **Recipient** | Name, title, organization, address | 3–5 lines |26| Subject | `Re: [short description]` — formal / memo only | 1 line |27| **Salutation** | `Dear [name],` — surname for formal, first name for warm | 1 line |28| **Body** | 2–4 paragraphs. Paragraph 1 = purpose. Final paragraph = ask. | Fills page |29| **Sign-off** | `Sincerely,` / `Best regards,` / `Warmly,` — match tone | 1 line |30| **Signature block** | ~3 blank lines (wet signature if requested) → printed name → title | 4–6 lines |31| Enclosures | `Enclosures: Resume, Portfolio` — only if attaching | 1 line |3233## Writing rules3435- **Open with purpose.** Paragraph 1, sentence 1, states why you are writing. No warm-up prose.36- **Close with the ask.** The final paragraph names a specific action (reply by date, meeting, reference check, acceptance).37- **One idea per paragraph.** Split if two.38- **Specific, not ornate.** "…the Staff Engineer role posted April 14" beats "…the aforementioned position."39- **No archaic phrasing.** Drop "kindly find enclosed," "I trust this letter finds you well," "as per our previous correspondence."40- **Active voice.** "I managed the migration" beats "the migration was managed by me."41- **Consistent names and dates** throughout.4243## Source & material4445Letters break on one wrong name, title, or date.4647- **No inferred recipients.** Don't guess titles, salutations, or addresses.48- **No fabricated references** — case IDs, dates, reference numbers, prior correspondence.49- **Required items present**: sender full name, ≥1 sender contact, recipient name, date, specific purpose, recipient title/org (formal variants). If missing, produce a gap table and ask once.5051## Distill raw input5253Skip if the input is already a drafted letter or a clear brief (purpose + ask + supporting points).5455If raw (bullet list, transcript, chat log):56571. Extract purpose, supporting points, requested action, and facts (names, dates, refs).582. Classify into Opening / Body / Close.593. Gap-check — explicit purpose? explicit ask? If either missing, ask.604. Ask once with a compact gap table.6162## Form-specific verification6364Beyond `done` + `fork_verifier_agent`:6566- **One page** at chosen paper size. Print preview confirms.67- **Facts** — every name, date, title, address matches source material.68- **Paragraph 1 states purpose. Final paragraph states the ask.**69- **Salutation matches recipient block** — same name, correct title.70- **Signature space preserved** if wet signature requested — ≥ 3 lines tall, prints that way.71- **Date format consistent** — header and any body references use the same form.7273## Feedback protocol7475| User says | Ask |76|---|---|77| "too formal" | Tone axis is currently [X]. Shift to [Y] — swap salutation, add contractions, loosen sign-off? |78| "too casual" | Same axes, reversed. |79| "doesn't land" | Opening sentence says "[quote]." Tighten to [option A] or sharpen the ask [option B]? |80| "signature looks wrong" | Signature block is [N lines, aligned X]. Shift to [new form]? |81| "feels cramped" | Paragraph spacing is X. Loosen to Y, or cut one paragraph? |8283Never say *"I'll adjust the tone"* without naming the exact change and its new form.8485## When not to use8687- Multi-page proposal letters, legal briefs → long-document skill.88- Email → different medium; extract the body for an email client.89- Marketing / promotional copy in letter form → `one-pager`.
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