build-in-public

name	build-in-public
description	This skill should be used when the user wants to write their end-of-day / evening "build-in-public" update for a given Linear project — 2-3 impact-focused bullets plus a Next line synthesized from the project's Linear activity and the repo's git/PR shipping evidence, ready to paste into the pod thread. Invoke as /build-in-public with a Linear project ID. Triggers on "build-in-public post", "evening update", "what did I ship today", "end-of-day update", or any variant of "what did I do today" for a work update — even without the word "skill". Default to drafting; never post anywhere automatically.
argument-hint	<linear-project-id>
allowed-tools	Bash(linear:*), Bash(git:*), Bash(gh:*), Bash(devsql:*), Bash(date:*), Bash(jq:*), AskUserQuestion

Build in public

Turn a day's raw work into a short, high-signal evening update that reads as impact and direction, not activity. It is NOT a demo and NOT a status report — its currency is progress + decisions + what got unblocked, which is exactly what foundation/groundwork days produce.

The reader is a PM / project owner, not a teammate dev. They do NOT know what a BOF-438 is, what a "walking skeleton" is, or which file a schema lives in. Write in features and business outcomes: name the feature ("Host submission form"), say what it unlocks for the product, and keep ticket IDs as trailing tags only — never as the subject of a sentence. If a bullet can't be understood by someone who has never opened the repo, it's written wrong. Jargon is the enemy, not length.

Match the pod's house style — this is how the user actually posts:

• Bullets are •, not -. Each is a complete, readable clause (not a telegraphic fragment): a full thought a PM can parse on its own. Don't compress a real sentence into noun-soup to save words.
• Trailing ticket tags, not inline PR links. Close a bullet with (BOF-518) or [BOF-438] — the work item, not a #1234 PR number (a bullet may carry several tags). The pod tracks tickets; a bare PR number means nothing to the reader. Surface a PR link only when the link is the point: the bullet is "ready for review", or a just-merged foundation whose merge unblocks the rest of a stack.
• First name only, no surname. The user signs 🛠️ Benjamin — DD/MM.
• 2-3 substantive bullets + a ⏭️ Next. Closer to 2 than 4. Cut anything that doesn't carry impact or position. The Next is adaptive (see below): a single • ⏭️ Next: … line when there's one continuation, or a ⏭️ Next header with ◦ sub-bullets when several distinct next items, a handoff, or a blocker need to surface.

Here are four real posts (use them as the target shape, not the abstract template):

🛠️ Benjamin — 22/06
• Spec'd out the Host submission form: locked the last open product questions on the host form + its payment-schedule data in the back-office, so the build can start clean. [BOF-438]
• Design session this morning with the team to move the payment queue itself forward.
• ⏭️ Next: kick off phase 1 of the Host submission form — first implementation slice.

🛠️ Benjamin — 25/06
• Rebuilt the payment-schedule feature as a clean 5-PR stack. The first pass wasn't up to bar — PRs too big to review, and the UI drifted too far from the mockups. Re-sliced by user story so each piece is small, reviewable, and ships on its own risk: Foundations (BOF-518), Marketplace form (BOF-519), Enterprise €50k gate (BOF-520), BO editing + host lock (BOF-521), rollout + telemetry (BOF-522). (BOF-438)
• Foundations is the shared base every slice rides on — payment-schedule contracts, schedule builder + validation, and sticky V2 assignment that locks a booking onto staged payments once chosen (BOF-518).
• ⏭️ Next: get Foundations reviewed (it gates the rest), then walk the stack up — Marketplace form (BOF-519), then Enterprise gate (BOF-520).

🛠️ Benjamin — 26/06
• Foundations (PR1) merged — it's the shared base the other 4 slices in the stack ride on, so the whole sequence is now unblocked: <PR link> (BOF-518).
• Marketplace payment form fully coded: the host sets their payment schedule (deposit → intermediary → balance) right in the booking flow — editor modal, schedule summary, and rollout. Still in draft, rides on Foundations (BOF-519).
• ⏭️ Next:
 ◦ Review + un-draft the Marketplace form (BOF-519)
 ◦ Decision on how to display the percentages (cumulative 60 / 80 / 100 vs fixed slices)
 ◦ Open the payment schedule form to all countries, NA included
 ◦ Define per-currency value thresholds (replacing the flat €50k limit) (BOF-520)

🛠️ Benjamin — 02/07
• Host submission form (V1) merged and deployed — hosts set their full payment schedule (deposit → intermediary → balance) in the BO. Live behind a feature flag, off until QA clears it (BOF-438).
• Kicked off milestone 2 in parallel, starting with multi-currency: the host-vs-Naboo routing now judges each deal at its own currency instead of a flat €50k applied everywhere — the piece that has to land before we open the form to non-euro markets (BOF-540).
• ⏭️ Next:
 ◦ Tomorrow I flip the flag on the preview env so that @Lucien can run QA on V1 (BOF-438).
 ◦ 🚧 Blocker: need a product call on North America — where/how do we display the form for this region? (BOF-541)

Note the range: the 22/06 and 25/06 posts close on a single-line Next; 26/06 and 02/07 open the Next into a ◦ block because there are several distinct next items (26/06) or a handoff + blocker to surface (02/07). The 26/06 headline carries an inline PR link on a just-merged foundation (it's the unblock, not a review request), and 30/06's cleanup bullet closed on multiple tickets (BOF-520, BOF-521, BOF-522). These bullets are complete clauses with a decision baked in, not one-line fragments — but the decision is stated, not narrated over a paragraph (see rule 4).

The update is scoped to one Linear project, passed as $ARGUMENTS. If no project ID is given, ask for it before gathering anything — it is the scope anchor and there is no sensible default.

Pod context (current default). Benjamin posts these in Slack #pod-payouts. The PM to @-mention for QA handoffs and product decisions is Lucien Thibert (@Lucien) — so when a Next sub-bullet hands off QA or raises a product call, address it to him by default. This is the current pod's convention, not hardcoded logic: for another project/pod, substitute the right channel and owner.

Step 1 — Resolve the project, then gather today's work

Pull the raw material first. Don't ask the user to type it out if the tools can find it. Linear is the primary source (the project scopes the work); git/PRs are the shipping evidence; devsql is enrichment + a heads-down backstop.

Resolve the project ID → name first. linear issue query filters by --project name, not ID, while $ARGUMENTS is a project ID. Look up the name (and team) once:

linear project view "$ARGUMENTS" --json | jq -r '{name, team: .teams.nodes[0].key}'

Linear — issues in that project that moved today (use the resolved name):

linear issue query --project "<name>" --assignee "@me" \
  --updated-after "$(date +%F)" --all-states --limit 50 --json

Split the results into shipped (state type completed, or state name matching /review/i) vs in-flight (started). See the linear-cli skill for any further CLI mechanics — don't re-document them here.

Linear is the scope authority. git/PRs are evidence only when they map to a Linear issue in this project. A repo holds work for many projects; today's commits and PRs may belong to a different one entirely. Before any PR/commit becomes a bullet, confirm its issue is in the project's linear issue query result above. If it isn't — drop it, don't narrate it. Likewise, a CLOSED PR is not "in-flight": don't invent a story to reconcile it. When in doubt about whether a day produced shippable code at all, ask the user one line ("code today, or spec/planning?") rather than assembling a plausible-looking shipping narrative from loose git activity. Fabrication is the worst failure mode here.

git / PRs — shipping evidence from the current repo:

# PRs authored today (opened, updated, or merged)
gh pr list --author "@me" --state all --search "updated:>=$(date +%F)"

# Commits today (current branch/repo only — no --all)
git log --author="$(git config user.email)" --since="00:00" --oneline

devsql — what was actually worked on and decided today (this repo): local Claude Code/Codex history joined with git. Use it to recover decisions and their rationale (the "because Z" in rule 4) and to substantiate a heads-down day (rule 7) when git+Linear are thin — NOT to list activity.

# Today's session topics for this repo
devsql "SELECT s.title, s.git_branch, s.user_message_count
  FROM sessions s
  WHERE s.cwd = '$(pwd)'
    AND date(s.last_timestamp) = date('now','localtime')
  ORDER BY s.last_timestamp DESC"

For prompt-level detail (the actual decisions debated), query history.display filtered to today. See the devsql-querying skill for schema and query mechanics (note cwd can be a worktree path, and title may be empty on in-progress sessions — fall back to git_branch). devsql reads local history only and may be absent — treat it as optional. It is the weakest of the three signals: never let a raw prompt become a bullet, and never let it inflate the post toward activity-over-impact.

If a source isn't reachable (no linear/gh/devsql, auth fails, project ID invalid), fall back to asking the user to paste their issues/PRs — never fabricate activity.

Step 2 — Synthesize (this is the whole point)

Apply these rules, in priority order. They exist because a daily that just lists tasks ("worked on X, worked on Y") signals effort, not impact — and on a foundation day it makes real work look like nothing.

1. Foundation as headline. If several items share a piece of infra/groundwork built (a flag, a collection, an abstraction, a schema), lead with that shared foundation and make the features the evidence it already pays off ("two consumers ride on it"). Cross-cutting groundwork is the strongest impact signal — never bury it in a parenthetical.
2. Report movement, not effort. Ban "started / began / worked on / spent time on". State what is now true (shipped / in review / in flight) and where it sits on the trajectory. "Started the email" → "Email scaffolded from the PRD; data layer done."
3. One impact anchor. At least one bullet ties to the business why / what it unlocks (the "so that"). If the why isn't obvious from the work, DO NOT invent it — surface it as a one-line note for the user to confirm or fill in.
4. Decisions carry their rationale. When the day's work was a choice, render it "X over Y because Z" rather than just naming the change. The "because Z" usually isn't in git or Linear — mine the devsql session/prompt history to recover it.
5. Tag the work item. Every concrete item closes with its issue tag — (BOF-518) or [BOF-438], the work item the pod tracks. A bullet may close on multiple tickets when it genuinely spans them — (BOF-520, BOF-521, BOF-522) for a cleanup pass across a stack. Inline PR numbers (#1234) are NOT the default, but surface a PR link when the link is the point: a review request ("ready for review", "needs a reviewer"), or a just-merged foundation whose merge unblocks the rest of a stack (the link is the proof it landed).
6. Shape the Next by grain. One continuation → a single ⏭️ Next: line. Several distinct next items, or a handoff, or a blocker → break ⏭️ Next into ◦ sub-bullets. Separate in-flight continuations from new big items; don't flatten a multi-day new workstream to the same level as "finish the thing I'm already on". A handoff or blocker is its own ◦ sub-bullet, prefixed 🚧 and addressed to its owner (@Lucien for QA/product calls) — e.g. ◦ 🚧 Blocker: need a product call on North America … (BOF-541). Don't force a ◦ block when one line says it all.
7. A heads-down day is a legitimate report. If there's no shippable or visual output, say so honestly and give position + ETA ("Deep in the X schema, no visible output yet, first cut tomorrow"). When git+Linear are thin, the devsql session titles/topics are what tell you where you got to and what's next. This sets expectations and kills the "what are they doing?" question. Never pad to look busy.
8. Complete clauses, not fragments — 2-3 bullets + one Next. Each bullet is a full, readable thought (the real posts above are the bar), not a telegraphic noun-phrase. But brevity lives in the count: closer to 2 substantive bullets than 4, riding on shared pod context. A bullet may carry a decision and its consequence; it must not sprawl into a paragraph.

Step 2.5 — Order before you write

Rule 1 is a principle the model reads then ignores, generating in the chronological order it gathered (engine → mail → "oh and the shared path"). This step is the forcing function. Do it explicitly before writing a single bullet:

1. Name the one cross-cutting item — the shared infra/groundwork that ties multiple items together (here: the single PO-detection path both consumers ride). There is at most one.
2. It appears exactly once. If a bullet's tail re-describes it (e.g. "…riding on the shared X the cron also uses"), cut the tail. No point is stated twice — least of all the shared-infra one.
3. Placement (tiebreak rule 1 vs 3):
   • Shared-infra is the day's biggest deliverable → headline (bullet 1).
   • Otherwise → bullet 2, as the spine connecting the consumers. Never last, never a parenthetical.
   • Don't mechanically promote a minor arch note to the top just to satisfy rule 1.

Step 2.7 — De-slop with humanizer

Once the bullets are written, pass the draft through the humanizer skill to strip AI tells (inflated/promotional words, vague attributions, filler phrases, signposting) and apply the user's personal STYLE.md if present.

The Output format below overrides humanizer — this post's conventions are intentional, not slop. Humanizer must NOT touch:

• em-dashes and → arrows — they are structure (foundation → unlock, decision X → Y), not dash overuse.
• terse fragments — bullets are not required to be full sentences; the post rides on shared pod context.
• emoji, •/◦ bullets, and ticket tags — 🛠️, ⏭️, 🚧, •, ◦, (BOF-518), [BOF-438], and @mention handoffs all stay.

So: keep the shape, remove the tells. If humanizer is unavailable, ship the draft as-is — it's a polish pass, not a gate.

Output format

ALWAYS produce a fenced markdown block ready to paste, in one of these two shapes. Pick by grain — single-line Next when there's one continuation, ◦ block when several items / a handoff / a blocker need to surface (rule 6).

Single-line Next (one continuation):

🛠️ <first name> — <date>
• <foundation or highest-impact item — complete clause, what it unlocks, trailing (TICKET)>
• <consumer / feature item — status, trailing (TICKET)>
• ⏭️ Next: <in-flight continuation>. Then <new item (TICKET)>.

◦ block Next (several items / handoff / blocker):

🛠️ <first name> — <date>
• <foundation or highest-impact item — complete clause, what it unlocks, trailing (TICKET)>
• <consumer / feature item — status, trailing (TICKET)>
• ⏭️ Next:
 ◦ <in-flight continuation (TICKET)>
 ◦ 🚧 Blocker: <decision needed, addressed to owner e.g. @Lucien> (TICKET)

• Bullets are •, Next sub-bullets are ◦ (leading space). First name only in the header. Date via $(date +%d/%m).
• 2-3 substantive bullets + the Next. A third bullet only if it carries its own impact — otherwise stop at 2.
• Close each concrete item with its (TICKET) tag; a bullet may carry multiple tags when it spans them. Use a PR link on a review-request bullet or a just-merged foundation that unblocks a stack (rule 5).

Gate before delivering

This is not a decorative checklist — it is a gate. Before emitting, run every item. If any item fails, rewrite the post and re-run the whole list. Emit nothing until all pass.

• No "started / began / worked on" — every line states movement or position.
• Every bullet is readable by a PM who has never opened the repo — feature/business language, no jargon, ticket IDs as trailing tags only.
• Bullets are •, header is first-name-only, each bullet is a complete clause (not a telegraphic fragment).
• Every PR/commit cited maps to a Linear issue in this project — nothing pulled in from other projects, nothing fabricated to explain loose git activity.
• The one cross-cutting item is headline or bullet 2 — never last, never buried (Step 2.5).
• No point is stated twice — least of all the shared-infra one.
• At least one real impact/unlock anchor — and nothing invented.
• Every concrete item closes with its (TICKET) tag (one or several); PR links appear only on review-request bullets or a just-merged foundation that unblocks a stack.
• Next is single-line when one item, a ◦ block when several / a handoff / a blocker; it separates in-flight from new, and any blocker is prefixed 🚧 and addressed to its owner (@Lucien for QA/product).
• 2-3 bullets + one Next (single-line or ◦ block) — closer to 2 than 4.
• Any inferred "why" flagged for the user to confirm.
• Draft passed through humanizer (slop removed; em-dashes/→/fragments/emoji preserved).

Delivery

Output the block in chat for the user to review and paste. Never post to Slack (or anywhere) automatically. Only if the user explicitly asks, create a Slack draft (a draft, not a send) so they review it in their client. Always list any assumptions made about the "why" as a short note under the draft.

Example

Raw work (input):

• Started migrating the auth module to an adapter pattern
• Worked on the SSO config UI
• Fixed the cron timeouts

Update (output):

🛠️ Benjamin — 18/06
• Laid the shared auth adapter: one provider abstraction replacing the per-IdP branches, so multi-tenant SSO and future IdPs ride on a single path instead of new code each time (PROJ-211).
• SSO config UI wired onto the adapter — in review (PROJ-214).
• ⏭️ Next: finish the SSO UI. Then a new workstream — SCIM provisioning (PROJ-88).

Note the transform: the adapter (foundation) becomes the headline, the UI becomes proof it pays off, "fixed/worked on" become movement, each bullet is a complete clause closing on its ticket tag, and 3 raw tasks collapse to 2 bullets + Next. Compare against the three real posts up top — same shape.