Add a server-side, atomic, declarative reconcile loop for a single app —
the foundation of the project-tool design. Developers describe an app's
scripts, routes, triggers, and secret-names in `picloud.toml`, then
`pic pull / plan / apply [--prune]` to converge live state to the manifest.
Server (manager-core):
- apply_service: a pure diff engine (compute_diff) shared by plan and
apply, plus an ApplyService that composes the existing per-repo writes
into ONE Postgres transaction. Identity keys mirror the DB UNIQUE
constraints (script=lower(name); route=(method,host_kind,host,
path_kind,path); trigger=per-kind semantic tuple; secret=name).
Apply takes a per-app advisory lock, recomputes the diff in-tx, applies
scripts -> routes -> triggers, prunes dependents-first, commits, then
refreshes the route table once post-commit.
- apply_api: POST /apps/{id}/plan (AppRead) and /apps/{id}/apply.
Apply requires the per-kind write caps the bundle exercises (all three
when --prune), plus AppSecretsRead when it binds an email trigger.
- tx-accepting repo siblings (insert/update/delete *_tx) so the existing
create/update/delete delegate to one SQL definition each.
- email triggers reference an inbound secret by NAME; the value is
resolved, decrypted (AAD-bound), and re-sealed server-side at apply —
it never travels in the manifest.
CLI (picloud-cli):
- manifest.rs (picloud.toml model), client plan/apply, and the pull/plan/
apply commands. pull rejects filesystem-unsafe script names up front.
Safety properties enforced and tested:
- idempotent: a freshly-pulled manifest re-applies as all-NoOp.
- atomic: a mid-bundle failure rolls back with nothing written.
- routes delete-before-insert so a freed binding is reusable in one apply.
- queue one-consumer invariant held inside the shared tx.
- email triggers are never pruned, and a script that still owns an
email/dead-letter trigger can't be pruned (the FK cascade would destroy
the sealed secret) — refused with a pointer to `pic triggers rm`.
- plan and apply agree on unset email-secret references.
No migration: the existing schema's UNIQUE constraints serve as identity
keys. Groups, env-scoping, and the `enabled` toggle are later milestones.
Tested: manager-core lib (360) + CLI bins (27) + 8 project-tool journeys
(pull/plan/apply/prune/email+queue), all green; clippy -D warnings clean.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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