MechaCat02 7c17d6e363 feat(hierarchies): template {var:NAME} resolves in-transaction (M6)
Route/trigger template `{var:NAME}` placeholders now resolve against vars
applied in the SAME `pic apply` transaction, not committed-only state — so a
var and a template referencing it converge in one apply instead of two.

- config_resolver: add tx-scoped `fetch_var_candidates_tx`, sharing the SQL
  tail (`VAR_CANDIDATES_TAIL`) with the pool variant so they can't drift.
- apply_service: `expand_route_templates_tx`/`expand_trigger_templates_tx`
  read vars via the tx (vars are reconciled in Phase A / the app's own
  reconcile, both before Phase B expansion).
- templates journey: `route_template_var_resolves_in_same_apply` — would fail
  against the old committed-only read.
- doc §4.5: strike the `{var:NAME}` committed-only limitation.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-06-28 18:11:44 +02:00

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.

Description
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