Addresses review on #519 (@didericis 6143 + the fail-hard direction over the codex skip). Base owns the flow (6143 / ADR 0006). `attach_bottled_agents_to_gateway()` is now a concrete method on `BottleBackend` that delegates to `gateway_attach.reconcile_running_bottles`; backends override only three primitives — `_gateway_attach_resources()`, `_running_bottles()`, `_attach_bottle_to_gateway()`. The shared control flow + error policy live in one place so a backend can't drift onto a bespoke loop or a silent skip. Keeps the reconcile flow + `GatewayAttachResources` out of `backend/base.py` (the size guardrail) in a dedicated `backend/gateway_attach.py`. New ADR 0006 records the "shared behaviour in the base backend, subclasses override primitives" theme. Fail hard, never skip (the maintainer's direction over the codex review's skip). Any attach failure now aborts bring-up instead of being logged and skipped: a bottle that silently can't reach the fresh gateway (its egress just starts failing TLS) is worse than a loud failure. Every bottle is attempted and the failures are raised together (aggregate `InfraLaunchError`) so one bring-up surfaces the full blast radius. Resource gathering (the CA fetch) also fails hard. PRD 0081 goal + design updated to match (reversed from the earlier "tolerate per-bottle failures" draft). Bumps the base.py guardrail cap 580->600 for the new contract surface (the delegator + 3 abstract primitives); the flow itself lives in gateway_attach.py. Refs #516, #519. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Product requirement docs
One PRD per feature: what to build, why, and how it's scoped. The PRD
is the durable spec — it should stand on its own without a Gitea issue
thread (see ../README.md for when a PRD is the right
document vs. a research note or a decision record).
Naming and numbering
New PRDs may use a prd-new-<kebab-title>.md placeholder name while the
design is being drafted. Before merge, assign the next sequential number
after the highest-numbered PRD on main, rename the file to
NNNN-<kebab-title>.md, and update the title header. CI blocks merging
while any prd-new-*.md placeholder remains. If concurrent PRs select the
same number, the later PR must take the next available number before it
merges. Numbers are never reused; gaps are fine.
Once numbered, the filename stays fixed for the life of the doc.
Status
The Status: line near the top tracks the PRD's lifecycle:
- Draft — proposed, not yet shipped.
- Active — the design has shipped to
mainand is in effect. - Superseded by PRD NNNN — replaced by a later PRD; kept for history.
- Retargeted by PRD NNNN — folded into a later PRD's scope.
Format
# PRD prd-new: <short title> ← replace with the final number before merge
- **Status:** Draft
- **Author:** <who>
- **Created:** YYYY-MM-DD
- **Issue:** #<n> # optional — convenience pointer only
## Summary
One paragraph: what this builds and the pain it solves.
## Problem
The current state and why it's inadequate.
## Goals / Success Criteria
Bullets a reviewer can check the finished work against.
## Non-goals
What this explicitly does not do — and won't, to head off scope creep.
## Scope
In scope / out of scope, when the boundary needs spelling out.
## Design
How it works: schema, data flow, diagrams, algorithms as needed.
## Implementation chunks
Ordered, mergeable steps (optional; for multi-PR features).
## Open questions
Unresolved decisions — resolve or fold into Design before shipping.
Sections are a guide, not a straitjacket: drop the ones a given PRD doesn't need (a small change rarely needs Scope or Implementation chunks) and add others where they help (e.g. Testing strategy, Alternatives considered, References). Keep the rationale self-contained — inline the reasoning rather than linking out to an issue thread, so the PRD survives a move off Gitea.