Letterhead
US Letter primary · A4 variant for international correspondence. Lockup top-left, sender meta top-right, light footer band carrying the contact line in mono. Body type sets at 11.5 pt with generous leading — the page reads as engineered, not corporate.
Default · US Letter + A4
Sheets shown at 0.7× scale for browser legibility — actual print dimensions 8.5 × 11 in (US Letter) and 210 × 297 mm (A4). Both use the same header / body / footer structure; only the canvas size changes.
The eval pass landed at 0.91 trigger on the Karpathy skill — first generation, no rewrites. Wanted to send a copy of the SKILL.md and the eval log so you can see what the harness produced.
The directive-template phrasing held against your published guidance. Nine of ten test queries fired correctly. The one miss was a phrasing edge case in the negative-control set, which is the right kind of miss — the skill resisted overtriggering rather than failing to fire when wanted.
I'll keep these letters short. Made one. It works. If anyone on the Skills team wants the eval data, paul@enact.app reaches me directly.
The eval pass landed at 0.91 trigger on the Karpathy skill — first generation, no rewrites. Wanted to send a copy of the SKILL.md and the eval log so you can see what the harness produced.
The directive-template phrasing held against your published guidance. Nine of ten test queries fired correctly. The one miss was a phrasing edge case in the negative-control set, which is the right kind of miss — the skill resisted overtriggering rather than failing to fire when wanted.
I'll keep these letters short. Made one. It works. If anyone on the Skills team wants the eval data, paul@enact.app reaches me directly.
Header & footer detail
Both bands at full scale so the type and lockup proportion are legible. Header carries the lockup and sender; footer carries the brand line and the contact strip. One Signal block on the page — and one Signal pill in the footer marking the social handle.
Print specs
For the printer. Two-color spot print on cotton stock — same finishing language as the business card so a sender's letter and card read as a set.
Dimensions
US Letter primary · A4 (210 × 297 mm) variant on the same template
Margins
Equal left and right · 1.25 in top for header band · 0.75 in bottom for footer
Stock
Mohawk Superfine or Crane Lettra · matches the business card stock
Carbon (Pantone Black C) + Signal (Pantone 116 C) · no 4-color process
Type
Geist must be outlined to paths in Illustrator before sending to printer
Body
Geist Regular 400 · Carbon · max measure ≈ 56 characters
Header type
Sender meta only · Graphite for label, Carbon for value
Footer type
Brand line left, contact strip right · single Signal pill on the @ handle