719a17432f
Phase 4-lite C3. A descendant app can now resolve and run a group-owned script
inherited down its ownership chain — the core of group-script inheritance.
Resolver (repo, reusing config_resolver's CHAIN_LEVELS_CTE):
* `get_by_name_inherited(app_id, name)` — walk app → ancestor groups
nearest-first, return the nearest script of that name (an app's own script
shadows an inherited group one: CoW).
* `is_invocable_by_app(script_id, app_id)` — EXISTS over the same chain; the
cross-app isolation predicate generalized to the hierarchy.
invoke(): `invoke("name", …)` resolves via `get_by_name_inherited`, so a script
can call a shared group endpoint by name. A group script always runs under the
*caller's* app context, never its owner.
Dispatch guards (the isolation backstops touched in C1) are now chain-aware via
a `Dispatcher::script_invocable` helper and the chain-aware
`validate_trigger_target`: app-owned scripts keep the in-memory fast path (no
query, behavior byte-identical to the pre-Phase-4 same-app guard); only a
group-owned candidate pays one chain query, and a non-member / query error
fails closed (dead-letter or reject — never run under another app's SdkCallCx).
The orchestrator HTTP route path needs no change: its per-app route trie
already scopes routes to one app, and it dispatches under the route's app
without reading script.app_id — a route bound to a group script just works.
Live-validated against the dev DB: an app under group G invoking the group's
`shared` returns its output; an app NOT under G cannot resolve it (isolation);
and after the app deploys its own `shared`, the same call returns the app's
version (CoW shadowing). Route/trigger binding of inherited scripts via the
declarative engine is C4.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
PiCloud
A lightweight, self-hosted, event-driven serverless compute platform. Upload a Rhai script, get an HTTP endpoint. Designed to run on a single modest server with no idle CPU cost, and to scale out to a small cluster when you need it.
Status: Phase 1 — MVP scaffolding in progress.
The authoritative design lives in
serverless_cloud_blueprint.md.
Why
Existing serverless platforms are either cloud-locked, heavyweight, or both. PiCloud aims for the opposite end of the spectrum: one binary, one database, one reverse proxy — running on hardware you already own.
Architecture (one paragraph)
PiCloud splits into three logical services — manager (control plane: scripts, schedules, dashboard), orchestrator (per-node event ingress and dispatch), and executor (per-node Rhai sandbox) — each backed by a *-core Rust library. In MVP they run in a single process; in cluster mode they run as three binaries with one manager and one orchestrator + executor per node. Caddy fronts everything; PostgreSQL is the single source of truth.
See CLAUDE.md for working notes and serverless_cloud_blueprint.md for the full design.
Quick Start
Coming as scaffolding lands. For now:
# Rust toolchain (pinned via rust-toolchain.toml)
cargo check --workspace
# Run the all-in-one MVP binary (once main.rs is wired up)
cargo run -p picloud
Repository Layout
crates/
shared/ cross-cutting types
executor-core/ Rhai engine + sandbox
orchestrator-core/ event ingress, dispatch
manager-core/ control plane
picloud/ MVP all-in-one binary
picloud-{manager,orchestrator,executor}/ cluster-mode binaries (skeleton)
dashboard/ SvelteKit
caddy/ Caddyfile
docker/ Dockerfiles
docs/
git-workflow.md Trunk-based workflow
Contributing
See docs/git-workflow.md for the branching and commit conventions. TL;DR: trunk-based, short-lived branches, Conventional Commits, no force-pushing main.
License
TBD.