feat: Introduce Bats testing framework and helpers

tests/README.md

@@ -0,0 +1,56 @@
+# Tests
+
+Deterministic tests for the mechanical layer of the framework — **no LLM, no GPU, no
+network**. They simulate pi's output with fixtures and exercise the scripts directly, so
+they run anywhere (laptop, CI, a git hook). They do **not** belong on vm101 or in n8n.
+
+## What's covered
+
+| File | Covers |
+|------|--------|
+| `scripts.bats`    | `slug.sh`, `log-append.sh`, `index-append.py` (insert, sort, bump, idempotent) |
+| `lint.bats`       | `lib/lint.sh` validators + `scoped-lint.sh` reuse |
+| `structure.bats`  | `lib/structure.sh` report/sync |
+| `run-ingest.bats` | `run-ingest.sh` end-to-end (DRY_RUN, local bare remote) — needs `jq` |
+
+`run-ingest.bats` auto-`skip`s if `jq` is missing; everything else needs only bash + git
+(+ `python3` for the index tests).
+
+## Install bats
+
+```bash
+# Debian/Ubuntu
+sudo apt install bats
+# or pinned, as a vendored submodule
+git submodule add https://github.com/bats-core/bats-core.git test/bats
+```
+
+## Run
+
+```bash
+bats tests/            # whole suite
+bats tests/lint.bats   # one file
+bats -f "sorted" tests/scripts.bats   # filter by name
+```
+
+Each test builds its own throwaway genome under `BATS_TEST_TMPDIR` (auto-cleaned) with a
+local bare git remote, so `open-pr.sh --DRY_RUN` can branch/commit/push without touching
+Forgejo.
+
+## Makefile targets
+
+```make
+test:
+	@bats tests/
+
+verify-structure:
+	@bash scripts/verify-genomes.sh
+
+sync-structure:
+	@bash scripts/verify-genomes.sh --sync
+```
+
+## Note on `helpers.bash`
+
+`FIXTURE_DIRS` in `helpers.bash` must match `GENOME_DIRS` in `lib/structure.sh`. If you
+change the canonical layout, update both (the structure tests assume a clean baseline).

tests/helpers.bash

@@ -0,0 +1,98 @@
+#!/usr/bin/env bash
+# tests/helpers.bash — shared helpers for the bats suite.
+
+REPO_ROOT="$(cd "${BATS_TEST_DIRNAME}/.." && pwd)"
+LIB_DIR="${REPO_ROOT}/lib"
+SKILL_SCRIPTS="${REPO_ROOT}/skills/ingest/scripts"
+
+# Canonical dirs a fresh genome must contain (kept in sync with lib/structure.sh).
+FIXTURE_DIRS=(
+  raw/articles raw/transcripts raw/code-packs raw/assets raw/private
+  wiki/sources wiki/entities wiki/concepts wiki/queries wiki/private
+)
+
+# make_fixture_genome → echoes the path to a throwaway genome checkout with a
+# local bare remote, the full canonical structure, and rendered index/log.
+# Uses BATS_TEST_TMPDIR so bats cleans it up automatically.
+make_fixture_genome() {
+  local base; base="$(mktemp -d "${BATS_TEST_TMPDIR:-/tmp}/genome.XXXXXX")"
+  git init --bare -q "${base}/origin.git"
+
+  local g="${base}/genome"
+  local d
+  for d in "${FIXTURE_DIRS[@]}"; do mkdir -p "${g}/${d}"; touch "${g}/${d}/.gitkeep"; done
+
+  cat > "${g}/wiki/index.md" <<'EOF'
+---
+title: "Index — genome-test"
+type: index
+domain: genome-test
+maturity: stable
+last_updated: 2026-01-01
+private: false
+---
+
+# Master Index: genome-test
+
+---
+
+## Sources (`wiki/sources/`)
+*Ingested raw materials.*
+
+
+## Entities (`wiki/entities/`)
+*People, tools.*
+
+
+## Concepts (`wiki/concepts/`)
+*Patterns.*
+
+
+## Queries (`wiki/queries/`)
+*Answers.*
+
+
+## Conflicts Pending Review (`wiki/queries/conflict-*.md`)
+*slugs only.*
+EOF
+
+  cat > "${g}/wiki/log.md" <<'EOF'
+---
+title: "Operations Log — genome-test"
+type: log
+domain: genome-test
+maturity: stable
+last_updated: 2026-01-01
+private: false
+---
+
+# Operations Log
+
+---
+
+## [2026-01-01] CONFIG | scaffolded
+- run_id: `init`
+EOF
+
+  echo "raw test" > "${g}/raw/articles/test.md"
+
+  mkdir -p "${base}/nohooks"
+
+  (
+    cd "${g}"
+    git init -q
+    # Hermetic: ignore the user's global git config (signing, global hooks);
+    # otherwise commit.gpgsign or a global core.hooksPath makes git commit fail here.
+    git config commit.gpgsign false
+    git config core.hooksPath "${base}/nohooks"
+    git config user.email t@t
+    git config user.name tester
+    git add .
+    git commit -qm init
+    git branch -M main
+    git remote add origin "${base}/origin.git"
+    git push -q -u origin main
+  ) >/dev/null
+
+  echo "${g}"
+}