{"messages":[{"content":"You are a constitutional council ranking individual git commits for ownership allocation.\n\nCompare these two commits. Decide which contributed more lasting value to the project.\n\nJudge substance, not spectacle:\n- Prefer correct, lasting design and real bugfixes over churn, formatting, renames, or generated noise.\n- Prefer clarity and necessity over sheer line count. A small precise change can beat a large diffuse one.\n- Do not favor a side merely because its patch is longer or noisier.\n- Weight what the change does for the project, not the contributor's name.\n\nReturn ONLY a JSON object: {\"winner\": \"A\" or \"B\", \"ratio\": \"N:M\", \"explanation\": \"...\"}\nThe explanation must cite concrete differences in the patches (1-3 sentences).\n\nSide A — contributor: tommy-mor\nSide A — commit message:\n[a2a83d76] plan\n\nSide A — unified diff (full patch):\ndiff --git a/PLAN.md b/PLAN.md\nnew file mode 100644\nindex 0000000000000000000000000000000000000000..38291545caebde2632e3fe409ea54c63abc30f5a\n--- /dev/null\n+++ b/PLAN.md\n@@ -0,0 +1,337 @@\n+# sorter2 storage & memory plan\n+\n+## Goal\n+\n+Fit a **decent chunk of Reddit** into a **256MB** Fly VM while keeping the product simple: one Rust binary, no external database service.\n+\n+**RAM should be bounded by query shape**, not dataset size — ideally one rank-centrality graph in memory at a time, plus runtime overhead.\n+\n+**`events.jsonl` remains the main database.** Everything on disk elsewhere is a **rebuildable projection**.\n+\n+---\n+\n+## Architecture (target)\n+\n+```\n+                    ┌─────────────────────────────────┐\n+                    │  events.jsonl (source of truth) │\n+                    └───────────────┬─────────────────┘\n+                                    │\n+                         append on every mutation\n+                                    │\n+                                    ▼\n+         ┌──────────────────────────────────────────────┐\n+         │  apply event → durable projection (on disk)     │\n+         │  (same semantics as today's in-memory reducer)  │\n+         └──────────────────────────────────────────────┘\n+                    │                    │\n+                    ▼                    ▼\n+         ┌──────────────────┐   ┌──────────────────────────┐\n+         │ entity_payloads  │   │ reducer state per scope   │\n+         │ (fat Reddit JSON)│   │ nodes, children, edges, … │\n+         └──────────────────┘   └──────────────────────────┘\n+                    │                    │\n+                    └────────┬───────────┘\n+                             ▼\n+         ┌──────────────────────────────────────────────┐\n+         │  RAM per request (or small LRU cache)         │\n+         │  • one scope's GroupState for rank-centrality │\n+         │  • children + EntityData (small views)        │\n+         │  • RC scratch allocations                     │\n+         │  → compute → render → drop / evict            │\n+         └──────────────────────────────────────────────┘\n+```\n+\n+This is **event sourcing / CQRS**:\n+\n+| Layer | Role |\n+|-------|------|\n+| **JSONL** | Canonical write log; audit; disaster recovery |\n+| **Durable (RocksDB)** | Materialized read model + payload store; rebuildable from JSONL |\n+| **RAM** | One (or few) hot scopes for ranking and render |\n+\n+Durable is **not** a second source of truth. If projection and log diverge, **stream JSONL and rebuild durable**.\n+\n+---\n+\n+## What we have today (baseline)\n+\n+| Piece | Status |\n+|-------|--------|\n+| `events.jsonl` append-only log | ✓ source of truth |\n+| `EventLog::replay` streaming one event at a time | ✓ no full `Vec<Event>` at startup |\n+| `entity_store` / `entity_db` (RocksDB via `durable`) | ✓ fat payloads off-heap |\n+| `EntityData` in `GlobalTree` | ✓ small derived views in RAM |\n+| Full `GlobalTree` replayed at boot | ✗ all nodes, all scopes' `GroupState` in RAM |\n+| Rank-centrality | ✓ already scoped per parent; reads in-memory `GroupState` |\n+\n+**Measured RSS (release, ~395 imports, 2.8MB JSONL):**\n+\n+| Scenario | RSS |\n+|----------|-----|\n+| Empty data dir | ~14 MB (+ RocksDB baseline) |\n+| After boot with data | ~21–22 MB |\n+| Pre-offload (in-tree payloads + vec replay) | ~25–34 MB |\n+\n+Payload offload + streaming replay helped startup peak, but **the full in-memory reducer** is still the scaling ceiling.\n+\n+---\n+\n+## What lives where (target)\n+\n+### JSONL (`events.jsonl`)\n+\n+All mutations, append-only:\n+\n+- `VoteRecorded` — scope, pair, ratios\n+- `EntityImported` — id, full upstream payload\n+- `NodeEnsured` — register path\n+- (legacy / other event types as present in log)\n+\n+### Durable / RocksDB (`{data_dir}/…`)\n+\n+Single embedded DB directory. Collections (names tentative):\n+\n+| Collection | Contents | Notes |\n+|------------|----------|-------|\n+| `entity_payloads` | `ItemId → JSON string` | **Done.** Fat Reddit API blobs |\n+| `nodes` | `ItemId → { data: EntityData, children: … }` | Small; no raw payload |\n+| `scopes/{parent}/…` | `GroupState` materialization | edges, voted_pairs, item_to_idx, recent_votes (capped) |\n+\n+Nested layout can follow durable's `Map → Map → Vec` patterns (see `durable/docs/001.md` Sorter sketch).\n+\n+### RAM\n+\n+| Resident | When |\n+|----------|------|\n+| Tokio, Axum, reqwest, RocksDB block cache (tuned) | always |\n+| **One scope slice** | per request (or LRU of few scopes, byte-capped) |\n+| Rank-centrality temporaries | during render for that scope |\n+\n+**Not** in RAM at steady state: all subreddits, all vote graphs, all payloads.\n+\n+---\n+\n+## Write path\n+\n+Order matters:\n+\n+1. Append event to `events.jsonl` (must durably succeed first)\n+2. Apply event to durable projection (same logic as today's `apply_event`)\n+3. Invalidate / update in-memory scope cache if that scope is hot\n+\n+Journal worker already serializes votes disk → tree; extend to **disk → durable** instead of (eventually) **disk → full GlobalTree**.\n+\n+```rust\n+// conceptual\n+append(jsonl, event)?;\n+apply_to_durable(event)?;\n+scope_cache.invalidate(scope_for(event));\n+```\n+\n+On failure after (1): replay from log repairs projection on next boot or via `replay-index` command.\n+\n+---\n+\n+## Read path\n+\n+For a page under parent scope `P` (e.g. `reddit.com/r/rust`):\n+\n+1. **Load scope** from durable (or scope LRU hit)\n+   - `EntityData` + children for listing\n+   - `GroupState` for ranking and pair selection\n+2. **Run rank-centrality** on that `GroupState` (requires RAM — that's fine)\n+3. **Render**\n+4. **Drop** scope from RAM or return to LRU\n+\n+Payload fetch (rare): `entity_store.get(id)` only when render needs fields not in `EntityData`.\n+\n+---\n+\n+## Startup & recovery\n+\n+### Normal startup\n+\n+```\n+open entity_db (RocksDB)\n+open / validate scope indexes in same DB\n+do NOT replay JSONL into RAM\n+serve requests (cold scopes loaded on demand)\n+```\n+\n+### Rebuild projection\n+\n+```\n+stream events.jsonl → apply_event → durable\n+(one line at a time; same as EventLog::replay today)\n+```\n+\n+Run when:\n+\n+- First deploy of projection layer\n+- Detected corruption / missing durable dir\n+- Manual `replay-index` after restoring JSONL from backup\n+\n+JSONL is the only file you need to trust for recovery.\n+\n+---\n+\n+## Scope cache (RAM bound)\n+\n+**Strict mode:** one scope in RAM at a time — simplest, lowest RAM.\n+\n+**Practical mode:** LRU cache with **byte budget** (e.g. 64–128MB for scopes on a 256MB VM):\n+\n+- Evict least-recently-used scope's `GroupState` + child views\n+- Reload from durable on next visit\n+\n+Eviction policy is independent of storage engine.\n+\n+---\n+\n+## Rank-centrality\n+\n+No change to the algorithm. It already assumes a whole `GroupState` for one parent scope.\n+\n+Moving reducer to durable does **not** remove RC memory cost — it removes **holding every scope's graph at once**.\n+\n+Optional later: materialized score vectors on disk, invalidated on vote. Not required for v1 of this plan.\n+\n+---\n+\n+## Durable mutations (future API)\n+\n+Separate **intent** from **apply** for batching and testability:\n+\n+```rust\n+let m = rankings.path().key(\"rust\").key(day).push_end(score);\n+db.apply(m)?;  // or batch.apply(&[m1, m2, m3])\n+```\n+\n+Benefits:\n+\n+- One RocksDB `WriteBatch` / one WAL flush per vote or import batch\n+- Serializable ops for tests\n+- Aligns with JSONL events at the app layer and storage ops at the durable layer\n+\n+Keep chained `entry().push()` as sugar over `path().…; apply()`.\n+\n+Type safety: use type-state path builders if we want compile-time nesting; erased `Vec<Op>` only if we accept runtime errors at apply.\n+\n+---\n+\n+## Storage engine: RocksDB vs alternatives\n+\n+**Current choice:** RocksDB via vendored `durable/` workspace crate.\n+\n+| Engine | Verdict for sorter2 |\n+|--------|---------------------|\n+| **RocksDB** | Good default for LSM, prefix scans, write-heavy votes + bulk imports. C++ dep, tune block cache for 256MB. |\n+| **sled** | Pure Rust appeal; production reliability history gives pause. Not a priority switch. |\n+| **fjall** | Pure Rust LSM; evaluate with benchmarks if leaving RocksDB. |\n+| **redb** | Lighter pure Rust; fine for payload-only store; less ideal for heavy scattered writes across scopes. |\n+| **SQLite** | Wrong shape for nested fractal tree; OK for a single KV table only. |\n+\n+**Switching engines matters less than:**\n+\n+1. Batched durable writes\n+2. Not materializing full reducer in RAM\n+3. Scope-local load/evict\n+\n+RocksDB stays **narrow**: blob attic + materialized reducer projection. Not a replacement for JSONL.\n+\n+---\n+\n+## Scaling story (before vs after)\n+\n+| | In-memory reducer (today) | Target (JSONL + durable projection) |\n+|--|---------------------------|-------------------------------------|\n+| **RAM grows with** | Total nodes + all scopes + (was) payloads | Hot scope count × scope size + runtime |\n+| **Disk grows with** | JSONL (+ entity_db payloads today) | JSONL + full durable projection |\n+| **Startup** | O(events) replay into RAM | O(1) open DB |\n+| **Fails when** | RSS > VM limit | Scope too large for one RC graph, or disk full |\n+| **Recovery** | Replay JSONL | Replay JSONL → rebuild durable |\n+\n+**Rough RAM per active subreddit (~500 posts, moderate votes):**\n+\n+| Component | Order of magnitude |\n+|-----------|-------------------|\n+| `EntityData` × 500 | 0.5–2 MB |\n+| `GroupState` | 1–5 MB |\n+| RC scratch | 1–5 MB |\n+| Runtime + tuned RocksDB | 15–25 MB |\n+| **Total one hot scope** | **~20–40 MB** |\n+\n+Multiple subreddits fit on 256MB with LRU eviction, not all resident at once.\n+\n+---\n+\n+## Implementation phases\n+\n+### Phase 0 — Done\n+\n+- [x] Vend `durable` as workspace crate (`durable/`)\n+- [x] `entity_store`: payloads in `{data_dir}/entity_db`\n+- [x] Remove `entity_raw` from `NodeState`\n+- [x] `EventLog::replay`: stream JSONL, one `Event` at a time\n+- [x] `apply_event` in `state.rs` for replay semantics\n+\n+### Phase 1 — Durable projection (write path)\n+\n+- [ ] Single `Db` under `{data_dir}/store` (payloads + reducer)\n+- [ ] `apply_event` writes to durable collections (nodes, scopes) in addition to or instead of `GlobalTree`\n+- [ ] Journal + Reddit import paths use same apply\n+- [ ] Batched writes where possible (one flush per vote / per import batch)\n+- [ ] Tests: apply event → read back from durable\n+\n+### Phase 2 — Stop full tree at boot\n+\n+- [ ] Startup: open durable only; no `GlobalTree::new()` + full replay into RAM\n+- [ ] `replay-index` command / flag: stream JSONL → durable (offline rebuild)\n+- [ ] Integration tests use replay-index fixture or temp DB\n+\n+### Phase 3 — Scope load on read\n+\n+- [ ] `ScopeView { parent, children, group }` loaded from durable\n+- [ ] HTML / vote / pair / fetch handlers take `ScopeView` instead of `&GlobalTree`\n+- [ ] Remove or shrink `Arc<RwLock<GlobalTree>>`\n+\n+### Phase 4 — Scope cache\n+\n+- [ ] LRU with byte budget for hot scopes\n+- [ ] Invalidate on write to that scope\n+- [ ] Metrics: cache hit/miss, evictions, scope load time\n+\n+### Phase 5 — Durable API polish (optional)\n+\n+- [ ] Reified path/mutation API + `WriteBatch` integration in `durable`\n+- [ ] RocksDB tuning preset for 256MB Fly (`block_cache`, write buffers)\n+- [ ] Document `replay-index` in AGENTS.md\n+\n+---\n+\n+## Non-goals (for now)\n+\n+- Distributed replication or multi-writer\n+- Replacing JSONL as canonical store\n+- SQL query layer over state\n+- Materialized rank scores on disk (unless RC latency forces it)\n+- Switching from RocksDB to sled without benchmarks\n+\n+---\n+\n+## Open questions\n+\n+1. **One DB or two?** `{data_dir}/entity_db` today vs single `{data_dir}/store` — merge on Phase 1?\n+2. **Scope key encoding** — string `ItemId` paths vs hashed; must match event `scope` field.\n+3. **Child scope wiring** — Reddit `apply_entity_under_parent` creates children without full path ensure; durable schema must preserve this.\n+4. **Clojure smoke tests** — still read `events.jsonl`; durable is internal. No change expected.\n+5. **Fly volume** — `/data` holds JSONL + RocksDB; monitor disk alongside RAM.\n+\n+---\n+\n+## Summary\n+\n+**JSONL = write log. Durable = full reducer on disk + fat payloads. RAM = one rank-centrality graph (or a small LRU of scopes).**\n+\n+Option B from design discussions is not separate from “reducer in durable” — it **is** reducer in durable, with JSONL still owning writes and recovery. The incremental work is: projection on apply, drop full tree at boot, scope load on read, then cache with eviction.\n\n\nSide B — contributor: tommy-mor\nSide B — commit message:\n[a45842df] better dev iteration script\n\nSide B — unified diff (full patch):\ndiff --git a/.gitignore b/.gitignore\nindex 9cd2eaece834481bee87639cd7cb6be77f33e302..b70cf5b97cd3556e061233d8b0aefd333568a991 100644\n--- a/.gitignore\n+++ b/.gitignore\n@@ -3,6 +3,7 @@ target/\n repomix-output.xml\n psalms_kjv.txt\n dev-data/\n+fixture-data/\n .worktrees/\n .specstory/\n .specstory/\ndiff --git a/bb.edn b/bb.edn\nindex 5d1d642d75d03f70879d7673e7ad95360336a8b1..4680e82d4227057d2eea6041dc5647beb759131d 100644\n--- a/bb.edn\n+++ b/bb.edn\n@@ -47,7 +47,7 @@\n                                            \"RUST_LOG\"      \"info\"})})))}\n \n   fixture\n-  {:doc \"Run local server + mock OAuth + seeded walkthrough data for manual browser demos\"\n+  {:doc \"Run local server via cargo-watch + mock OAuth + seeded walkthrough data (persistent ./fixture-data/, prefers PORT 8080). Requires cargo-watch.\"\n    :requires ([test.walkthrough-fixture :as walkthrough-fixture])\n    :task (walkthrough-fixture/run-fixture)}\n \ndiff --git a/server/src/html/forum.rs b/server/src/html/forum.rs\nindex e00e7110e2ad778d63b3d00b0cc4ffe20ba2e0d4..815fc6529062b103553644fc15e516334aec2b88 100644\n--- a/server/src/html/forum.rs\n+++ b/server/src/html/forum.rs\n@@ -976,12 +976,6 @@ pub async fn room_page(\n         html! {\n             (strip)\n             nav class=\"breadcrumb\" { (bc_room(&nav, slug_display, None)) }\n-            h2 { (slug_display) }\n-            p class=\"muted\" { (room_id) }\n-            p class=\"muted room-links\" {\n-                \"room garden · \"\n-                a href=(nav.garden_root_url()) { \"~\" }\n-            }\n             (room_members_section_markup(&reduced, &room_id, false))\n             h3 { \"threads\" }\n             (render_thread_feed(Some(&nav), \"room-thread-feed\", &rows, now))\ndiff --git a/test/common.clj b/test/common.clj\nindex 76a3e99fdb67c10bcb5c2f53d8bcd0917398af50..c6deba0d90995b0e3f9c4b8ad66a516ed19b870e 100644\n--- a/test/common.clj\n+++ b/test/common.clj\n@@ -107,6 +107,16 @@\n    (.close ss)\n    port))\n \n+(defn pick-port-prefer\n+  \"Use `preferred` if it can be bound, otherwise an ephemeral port (same as `pick-port`).\"\n+  [preferred]\n+  (try\n+    (let [ss (java.net.ServerSocket. preferred)]\n+      (.close ss)\n+      preferred)\n+    (catch java.io.IOException _\n+      (pick-port))))\n+\n (defn wait-for-server\n   \"Poll /healthz until it returns 'ok', up to `timeout-ms`.\"\n   [base-url timeout-ms]\ndiff --git a/test/walkthrough_fixture.clj b/test/walkthrough_fixture.clj\nindex 4b814822029c913e38151ca53848d1c64fb58373..a487ff1ef8548580577914fb33f321586859c9af 100644\n--- a/test/walkthrough_fixture.clj\n+++ b/test/walkthrough_fixture.clj\n@@ -1,11 +1,18 @@\n (ns test.walkthrough-fixture\n   \"Launch a local slug server with mock OAuth and seed browser-friendly demo data.\"\n   (:require [babashka.fs :as fs]\n+            [babashka.process :as p]\n             [cheshire.core :as json]\n             [clojure.string :as str]\n             [test.common :as common]\n             [test.oauth :as oauth]))\n \n+(def ^:private fixture-data-dir \"fixture-data\")\n+;; Prefer the same port as `bb dev` / `bb watch`; fall back if something else is listening.\n+(def ^:private preferred-slug-port 8080)\n+;; First `cargo watch` compile can exceed a release-binary startup; allow several minutes.\n+(def ^:private health-wait-ms 300000)\n+\n (defn- assert! [pred msg]\n   (when-not pred\n     (throw (ex-info msg {}))))\n@@ -85,49 +92,87 @@\n             :thread_url (str base-url \"/r/\" room-short \"/\" room-slug \"/t/walkthrough-thread\")\n             :garden_url (str base-url \"/r/\" room-short \"/\" room-slug \"/~/secret/item\")}}))\n \n+(defn- rebase-fixture-summary [saved current-base-url current-google-url current-data-dir]\n+  (let [inner (:summary saved)\n+        room (:room inner)\n+        rs (:short room)\n+        lg (:slug room)]\n+    (assoc saved\n+           :base_url current-base-url\n+           :mock_google_url current-google-url\n+           :data_dir (str current-data-dir)\n+           :summary (assoc inner\n+                           :room (assoc room\n+                                         :url (str current-base-url \"/r/\" rs \"/\" lg)\n+                                         :thread_url (str current-base-url \"/r/\" rs \"/\" lg \"/t/walkthrough-thread\")\n+                                         :garden_url (str current-base-url \"/r/\" rs \"/\" lg \"/~/secret/item\"))))))\n+\n+(defn- fixture-log-present? [data-dir]\n+  (let [p (fs/path data-dir \"events.jsonl\")]\n+    (and (fs/exists? p) (pos? (fs/size p)))))\n+\n+(defn- load-or-seed-summary!\n+  [base-url google-url data-dir summary-path]\n+  (if (and (fixture-log-present? data-dir) (fs/exists? summary-path))\n+    (let [saved (json/parse-string (slurp summary-path) true)\n+          rebased (rebase-fixture-summary saved base-url google-url data-dir)]\n+      (spit summary-path (json/generate-string rebased {:pretty true}))\n+      (println \"\")\n+      (println \"reusing fixture-data/ (delete the directory for a fresh seed)\")\n+      rebased)\n+    (let [seeded (seed-demo! base-url)\n+          s {:base_url base-url\n+             :mock_google_url google-url\n+             :data_dir (str data-dir)\n+             :summary seeded}]\n+      (spit summary-path (json/generate-string s {:pretty true}))\n+      s)))\n+\n (defn run-fixture [& _args]\n-  (let [build (common/run-cargo-build-release! [\"slugsocial-server\"])\n-        _ (assert! (zero? (:exit build)) \"cargo build --release failed\")\n-        server-bin \"target/release/slugsocial-server\"\n-        tmp-dir (str (fs/create-temp-dir {:prefix \"slug-walkthrough-\"}))\n-        slug-port (common/pick-port)\n+  (let [data-dir (str (fs/absolutize (fs/path (fs/cwd) fixture-data-dir)))\n+        slug-port (common/pick-port-prefer preferred-slug-port)\n         google-port (common/pick-port)\n         base-url (str \"http://127.0.0.1:\" slug-port)\n         google-url (str \"http://127.0.0.1:\" google-port)\n-        stable-dir \"/tmp/slug-walkthrough-fixture\"\n-        summary-path (str stable-dir \"/summary.json\")\n+        summary-path (str (fs/path data-dir \"summary.json\"))\n         !server (atom nil)\n         !google (atom nil)\n-        server-env (common/slug-server-env tmp-dir base-url google-url slug-port)]\n+        server-env (merge (common/slug-server-env data-dir base-url google-url slug-port)\n+                          {\"RUST_LOG\" \"info\"})\n+        watch-cmd [(common/cargo-bin) \"watch\"\n+                   \"-x\" \"run -p slugsocial-server\"\n+                   \"-w\" \"server/src\"\n+                   \"-w\" \"server/static\"\n+                   \"-w\" \"types/src\"]]\n     (try\n-      (fs/create-dirs stable-dir)\n+      (fs/create-dirs data-dir)\n       (reset! !google\n               (oauth/start-mock-google google-port\n                                        :google-users [\"google-user-alice\" \"google-user-bob\"]))\n-      (reset! !server (common/start-server server-bin server-env))\n-      (assert! (common/wait-for-server base-url 10000) \"server did not become healthy\")\n-      (let [seeded (seed-demo! base-url)\n-            summary {:base_url base-url\n-                     :mock_google_url google-url\n-                     :data_dir tmp-dir\n-                     :summary seeded}]\n-        (spit summary-path (json/generate-string summary {:pretty true}))\n+      (println \"\")\n+      (println \"starting cargo-watch (first compile may take a while)…\")\n+      (flush)\n+      (reset! !server (p/process watch-cmd {:inherit true :env server-env}))\n+      (assert! (common/wait-for-server base-url health-wait-ms) \"server did not become healthy\")\n+      (let [summary (load-or-seed-summary! base-url google-url data-dir summary-path)]\n         (println \"\")\n         (println \"walkthrough fixture ready\")\n         (println (str \"  base url:      \" base-url))\n         (println (str \"  room page:     \" (get-in summary [:summary :room :url])))\n         (println (str \"  thread page:   \" (get-in summary [:summary :room :thread_url])))\n         (println (str \"  garden page:   \" (get-in summary [:summary :room :garden_url])))\n+        (println (str \"  data dir:      \" data-dir))\n         (println (str \"  summary json:  \" summary-path))\n         (println \"\")\n         (println \"seeded users\")\n         (println \"  alice / bob via mock OAuth\")\n         (println \"\")\n+        (println \"editing server/src or server/static reloads the server; data persists in fixture-data/\")\n+        (println \"\")\n         (println \"press Ctrl-C to stop\")\n         (flush)\n         (while true\n           (Thread/sleep 1000)))\n       (finally\n         (when-some [s @!server] (common/kill-server s))\n-        (when-some [g @!google] ((:stop-fn g)))\n-        (fs/delete-tree tmp-dir)))))\n+        (when-some [g @!google] ((:stop-fn g)))))))\n","role":"user"}],"model":"openai/gpt-chat-latest"}