{"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[7bb7145d] url stuff\n\nSide A — unified diff (full patch):\ndiff --git a/AGENTS.md b/AGENTS.md\nindex e60b9ba6012593361ef10e8fdd9439cd9932e09b..babb889d6fbfb1fa7176c9e6b7544ae17b61dd2e 100644\n--- a/AGENTS.md\n+++ b/AGENTS.md\n@@ -58,4 +58,4 @@ Use **tmux** for `cargo run --package sorter2-server` (dev server). Rebuild afte\n \n - First `cargo test` / `cargo build --release` is slow; Clojure smoke test always does a release build.\n - `legacy/` and `ideas/` are not part of the workspace build.\n-- **ItemId** for web URLs is a canonical full URL (`https://reddit.com/r/rust`). Rules live in [`server/src/url_rules/`](server/src/url_rules/) (composable Rust, not a config DSL). After changing canonicalization rules, rebuild the projection: `cargo run --package sorter2-server -- replay-index`.\n+- **ItemId** for web URLs is a canonical full URL (`https://reddit.com/r/rust`). Rules live in [`server/src/url_rules/graph.rs`](server/src/url_rules/graph.rs): a semantic graph (DFA on host + path, query params in `Context`) with a generic internet fallback for unknown sites. After changing rules, rebuild the projection: `cargo run --package sorter2-server -- replay-index`.\ndiff --git a/server/src/url_rules/engine.rs b/server/src/url_rules/engine.rs\ndeleted file mode 100644\nindex e29b6b48c08deb7bffe031b1e542b1e25a7bef15..0000000000000000000000000000000000000000\n--- a/server/src/url_rules/engine.rs\n+++ /dev/null\n@@ -1,187 +0,0 @@\n-//! Composable URL normalization primitives.\n-\n-use std::collections::HashMap;\n-\n-use url::Url;\n-\n-/// Mutable URL view used by rule combinators before serializing to a canonical string.\n-#[derive(Debug, Clone)]\n-pub struct ParsedUrl {\n-    pub scheme: String,\n-    pub host: String,\n-    pub path_segments: Vec<String>,\n-    pub query: HashMap<String, String>,\n-    pub fragment: Option<String>,\n-}\n-\n-impl ParsedUrl {\n-    pub fn parse(raw: &str) -> Option<Self> {\n-        let trimmed = raw.trim();\n-        if trimmed.is_empty() {\n-            return None;\n-        }\n-\n-        let with_scheme = if trimmed.contains(\"://\") {\n-            trimmed.to_string()\n-        } else if trimmed.starts_with(\"r/\") || trimmed.starts_with(\"/r/\") {\n-            let rest = trimmed.trim_start_matches('/').trim_start_matches(\"r/\");\n-            format!(\"https://reddit.com/r/{rest}\")\n-        } else if trimmed.contains('.') && !trimmed.starts_with('/') {\n-            format!(\"https://{trimmed}\")\n-        } else {\n-            trimmed.to_string()\n-        };\n-\n-        let url = Url::parse(&with_scheme).ok()?;\n-        let host = url.host_str()?.to_string();\n-        let path_segments: Vec<String> = url\n-            .path_segments()\n-            .map(|segs| segs.filter(|s| !s.is_empty()).map(str::to_string).collect())\n-            .unwrap_or_default();\n-\n-        let mut query = HashMap::new();\n-        for (k, v) in url.query_pairs() {\n-            query.insert(k.into_owned(), v.into_owned());\n-        }\n-\n-        Some(Self {\n-            scheme: url.scheme().to_string(),\n-            path_segments,\n-            query,\n-            fragment: url.fragment().map(str::to_string),\n-            host,\n-        })\n-    }\n-\n-    pub fn with_path_segments(&self, segments: &[String]) -> Self {\n-        let mut u = self.clone();\n-        u.path_segments = segments.to_vec();\n-        u\n-    }\n-\n-    pub fn to_url(&self) -> Option<Url> {\n-        let mut url = if self.path_segments.is_empty() {\n-            Url::parse(&format!(\"{}://{}\", self.scheme, self.host)).ok()?\n-        } else {\n-            let path = format!(\"/{}\", self.path_segments.join(\"/\"));\n-            Url::parse(&format!(\"{}://{}{}\", self.scheme, self.host, path)).ok()?\n-        };\n-        if !self.query.is_empty() {\n-            let mut pairs: Vec<_> = self.query.iter().collect();\n-            pairs.sort_by(|a, b| a.0.cmp(b.0));\n-            url.query_pairs_mut().clear();\n-            for (k, v) in pairs {\n-                url.query_pairs_mut().append_pair(k, v);\n-            }\n-        }\n-        if let Some(ref frag) = self.fragment {\n-            url.set_fragment(Some(frag));\n-        }\n-        Some(url)\n-    }\n-\n-    pub fn canonical_string(&self) -> Option<String> {\n-        let url = self.to_url()?;\n-        let mut s = url.to_string();\n-        if self.path_segments.is_empty() {\n-            s = s.trim_end_matches('/').to_string();\n-        }\n-        Some(s)\n-    }\n-}\n-\n-pub fn force_https(u: &mut ParsedUrl) {\n-    if u.scheme == \"http\" {\n-        u.scheme = \"https\".to_string();\n-    }\n-}\n-\n-pub fn drop_fragment(u: &mut ParsedUrl) {\n-    u.fragment = None;\n-}\n-\n-pub fn strip_www(u: &mut ParsedUrl) {\n-    if u.host.starts_with(\"www.\") {\n-        u.host = u.host[4..].to_string();\n-    }\n-}\n-\n-pub fn lowercase_host(u: &mut ParsedUrl) {\n-    u.host = u.host.to_ascii_lowercase();\n-}\n-\n-pub fn lowercase_path(u: &mut ParsedUrl) {\n-    for seg in &mut u.path_segments {\n-        *seg = seg.to_ascii_lowercase();\n-    }\n-}\n-\n-pub fn clear_query(u: &mut ParsedUrl) {\n-    u.query.clear();\n-}\n-\n-pub fn keep_only_query(u: &mut ParsedUrl, keys: &[&str]) {\n-    u.query\n-        .retain(|k, _| keys.iter().any(|want| want == &k.as_str()));\n-}\n-\n-pub fn strip_tracking_params(u: &mut ParsedUrl) {\n-    u.query.retain(|k, _| {\n-        let lower = k.to_ascii_lowercase();\n-        !(lower.starts_with(\"utm_\")\n-            || matches!(\n-                lower.as_str(),\n-                \"fbclid\" | \"gclid\" | \"ref\" | \"ref_src\" | \"ref_source\" | \"mc_cid\" | \"mc_eid\"\n-            ))\n-    });\n-}\n-\n-pub fn truncate_after_segment(u: &mut ParsedUrl, name: &str, keep: usize) {\n-    if let Some(i) = u.path_segments.iter().position(|s| s == name) {\n-        let end = (i + 1 + keep).min(u.path_segments.len());\n-        u.path_segments.truncate(end);\n-    }\n-}\n-\n-pub fn drop_listing_suffix(u: &mut ParsedUrl, suffixes: &[&str]) {\n-    if u.path_segments.len() >= 3 && u.path_segments.first().map(String::as_str) == Some(\"r\") {\n-        if let Some(last) = u.path_segments.last() {\n-            if suffixes.iter().any(|s| *s == last.as_str()) {\n-                u.path_segments.pop();\n-            }\n-        }\n-    }\n-}\n-\n-pub fn normalize_reddit_host(u: &mut ParsedUrl) {\n-    if matches!(\n-        u.host.as_str(),\n-        \"old.reddit.com\" | \"new.reddit.com\" | \"www.reddit.com\"\n-    ) {\n-        u.host = \"reddit.com\".to_string();\n-    }\n-}\n-\n-pub fn rewrite_youtu_be(u: &mut ParsedUrl) {\n-    if u.host == \"youtu.be\" && u.path_segments.len() == 1 {\n-        let id = u.path_segments[0].clone();\n-        u.host = \"youtube.com\".to_string();\n-        u.path_segments = vec![\"watch\".to_string()];\n-        u.query.insert(\"v\".to_string(), id);\n-    }\n-}\n-\n-pub fn rewrite_youtube_shorts(u: &mut ParsedUrl) {\n-    if u.host == \"youtube.com\" && u.path_segments.first().map(String::as_str) == Some(\"shorts\") {\n-        if let Some(id) = u.path_segments.get(1).cloned() {\n-            u.path_segments = vec![\"watch\".to_string()];\n-            u.query.insert(\"v\".to_string(), id);\n-        }\n-    }\n-}\n-\n-pub fn normalize_youtube_host(u: &mut ParsedUrl) {\n-    if matches!(u.host.as_str(), \"m.youtube.com\" | \"www.youtube.com\") {\n-        u.host = \"youtube.com\".to_string();\n-    }\n-}\ndiff --git a/server/src/url_rules/mod.rs b/server/src/url_rules/mod.rs\nindex 03d53bd3e82d704a01ba3fd8dd02b7d31422c0de..9e1445346ce77a49dd6a7e7713bf9c57aef353cc 100644\n--- a/server/src/url_rules/mod.rs\n+++ b/server/src/url_rules/mod.rs\n@@ -1,8 +1,12 @@\n-//! URL canonicalization and hierarchy rules for [`crate::path_types::ItemId`].\n+//! URL canonicalization and hierarchy via a semantic graph (DFA + generic fallback).\n \n-mod engine;\n+mod graph;\n+mod parse;\n mod registry;\n \n+#[cfg(test)]\n+mod registry_tests;\n+\n pub use registry::{\n     canonicalize_raw, looks_like_url, navigable_breadcrumbs, parent_url, resolve_id, CanonicalResult,\n };\ndiff --git a/server/src/url_rules/registry.rs b/server/src/url_rules/registry.rs\nindex 14514e9af8385fb2b9b2f35eb9ee14d453d4b97c..8e6c012ea1fc74b864307bdacdf5a0f5db5259fc 100644\n--- a/server/src/url_rules/registry.rs\n+++ b/server/src/url_rules/registry.rs\n@@ -1,12 +1,7 @@\n-//! Per-domain canonicalization and hierarchy rules.\n+//! Public API: canonical identity and hierarchy via the URL graph.\n \n-use std::collections::HashSet;\n-\n-use super::engine::{\n-    clear_query, drop_fragment, drop_listing_suffix, force_https, keep_only_query, lowercase_host,\n-    lowercase_path, normalize_reddit_host, normalize_youtube_host, rewrite_youtu_be,\n-    rewrite_youtube_shorts, strip_tracking_params, strip_www, truncate_after_segment, ParsedUrl,\n-};\n+use super::graph::graph;\n+use super::parse::UrlParts;\n \n /// Result of canonicalizing a raw URL string.\n #[derive(Debug, Clone, PartialEq, Eq)]\n@@ -16,71 +11,16 @@ pub struct CanonicalResult {\n     pub alias_of: Option<String>,\n }\n \n-fn apply_global(u: &mut ParsedUrl) {\n-    force_https(u);\n-    drop_fragment(u);\n-    strip_www(u);\n-    lowercase_host(u);\n-    strip_tracking_params(u);\n-}\n-\n-fn normalize_reddit(u: &mut ParsedUrl) {\n-    normalize_reddit_host(u);\n-    lowercase_path(u);\n-    truncate_after_segment(u, \"comments\", 1);\n-    drop_listing_suffix(u, &[\"hot\", \"top\", \"new\", \"rising\", \"controversial\"]);\n-    clear_query(u);\n-}\n-\n-fn normalize_youtube(u: &mut ParsedUrl) {\n-    rewrite_youtu_be(u);\n-    normalize_youtube_host(u);\n-    rewrite_youtube_shorts(u);\n-    keep_only_query(u, &[\"v\", \"list\"]);\n-}\n-\n-fn normalize_default(_u: &mut ParsedUrl) {\n-    // Global rules only.\n-}\n-\n-fn domain_key(host: &str) -> &'static str {\n-    if host == \"reddit.com\" || host.ends_with(\".reddit.com\") {\n-        \"reddit.com\"\n-    } else if host == \"youtube.com\" || host == \"youtu.be\" {\n-        \"youtube.com\"\n-    } else {\n-        \"default\"\n-    }\n-}\n-\n-fn normalize_for_host(u: &mut ParsedUrl) {\n-    apply_global(u);\n-    match domain_key(&u.host) {\n-        \"reddit.com\" => normalize_reddit(u),\n-        \"youtube.com\" => normalize_youtube(u),\n-        _ => normalize_default(u),\n-    }\n-}\n-\n-/// Structural path segments that must not become standalone tree nodes when more path follows.\n-fn structural_trailing(host: &str) -> &'static [&'static str] {\n-    match domain_key(host) {\n-        \"reddit.com\" => &[\"comments\"],\n-        _ => &[],\n-    }\n-}\n-\n /// Canonicalize a raw URL. Returns `None` if the input is not URL-like.\n pub fn canonicalize_raw(raw: &str) -> Option<CanonicalResult> {\n     let trimmed = raw.trim();\n     if trimmed.is_empty() {\n         return None;\n     }\n-    let mut u = ParsedUrl::parse(trimmed)?;\n-    let input_snapshot = u.canonical_string()?;\n-    normalize_for_host(&mut u);\n-    let canonical = u.canonical_string()?;\n-    let alias_of = if input_snapshot != canonical {\n+    let parts = UrlParts::parse(trimmed)?;\n+    let g = graph();\n+    let canonical = g.resolve_canonical(&parts)?;\n+    let alias_of = if trimmed != canonical {\n         Some(trimmed.to_string())\n     } else {\n         None\n@@ -98,35 +38,14 @@ pub fn resolve_id(raw: &str) -> Option<String> {\n \n /// Navigable ancestor URLs from domain root up to and including `canonical` (full URLs).\n pub fn navigable_breadcrumbs(canonical: &str) -> Vec<String> {\n-    let Some(u) = ParsedUrl::parse(canonical) else {\n-        return vec![canonical.to_string()];\n+    let parts = match UrlParts::parse(canonical) {\n+        Some(p) => p,\n+        None => return vec![canonical.to_string()],\n     };\n-    let structural: HashSet<&str> = structural_trailing(&u.host).iter().copied().collect();\n-    let n = u.path_segments.len();\n-    let mut out = Vec::new();\n-\n-    // Domain root (no path segments).\n-    if let Some(base) = u.with_path_segments(&[]).canonical_string() {\n-        out.push(base);\n-    }\n-\n-    for i in 0..n {\n-        let segs: Vec<String> = u.path_segments[..=i].to_vec();\n-        let is_last = i == n - 1;\n-        let seg = u.path_segments[i].as_str();\n-        if structural.contains(seg) && !is_last {\n-            continue;\n-        }\n-        if let Some(url) = u.with_path_segments(&segs).canonical_string() {\n-            if out.last() != Some(&url) {\n-                out.push(url);\n-            }\n-        }\n-    }\n-    out\n+    graph().breadcrumbs(&parts)\n }\n \n-/// Immediate parent scope URL, or `None` for tree root / opaque single-segment ids.\n+/// Immediate parent scope URL, or `None` for tree root.\n pub fn parent_url(canonical: &str) -> Option<String> {\n     let crumbs = navigable_breadcrumbs(canonical);\n     if crumbs.len() <= 1 {\n@@ -148,88 +67,3 @@ pub fn looks_like_url(raw: &str) -> bool {\n         || t.starts_with(\"youtu.be/\")\n }\n \n-#[cfg(test)]\n-mod tests {\n-    use super::*;\n-\n-    #[test]\n-    fn reddit_post_drops_slug_and_normalizes_host() {\n-        let r = canonicalize_raw(\n-            \"https://old.reddit.com/r/AmItheAsshole/comments/1trnvdl/aita_for_cancelling/\",\n-        )\n-        .unwrap();\n-        assert_eq!(\n-            r.canonical,\n-            \"https://reddit.com/r/amitheasshole/comments/1trnvdl\"\n-        );\n-    }\n-\n-    #[test]\n-    fn reddit_strips_query_and_listing() {\n-        assert_eq!(\n-            canonicalize_raw(\"https://www.reddit.com/r/rust/?sort=top\")\n-                .unwrap()\n-                .canonical,\n-            \"https://reddit.com/r/rust\"\n-        );\n-        assert_eq!(\n-            canonicalize_raw(\"https://www.reddit.com/r/programming/hot\")\n-                .unwrap()\n-                .canonical,\n-            \"https://reddit.com/r/programming\"\n-        );\n-    }\n-\n-    #[test]\n-    fn reddit_short_path() {\n-        assert_eq!(\n-            canonicalize_raw(\"r/rust\").unwrap().canonical,\n-            \"https://reddit.com/r/rust\"\n-        );\n-    }\n-\n-    #[test]\n-    fn reddit_breadcrumbs_skip_phantom_comments() {\n-        let post = \"https://reddit.com/r/aww/comments/1trnvdl\";\n-        let crumbs = navigable_breadcrumbs(post);\n-        assert!(!crumbs.iter().any(|c| c.ends_with(\"/comments\")));\n-        assert_eq!(\n-            crumbs.last().map(String::as_str),\n-            Some(post)\n-        );\n-        assert!(crumbs.contains(&\"https://reddit.com/r/aww\".to_string()));\n-    }\n-\n-    #[test]\n-    fn reddit_parent_of_post_is_subreddit() {\n-        assert_eq!(\n-            parent_url(\"https://reddit.com/r/aww/comments/1trnvdl\").as_deref(),\n-            Some(\"https://reddit.com/r/aww\")\n-        );\n-    }\n-\n-    #[test]\n-    fn youtube_youtu_be_and_watch_same_canonical() {\n-        let a = canonicalize_raw(\"https://youtu.be/dQw4w9WgXcQ\").unwrap().canonical;\n-        let b = canonicalize_raw(\"https://www.youtube.com/watch?v=dQw4w9WgXcQ&t=10\").unwrap();\n-        assert_eq!(a, b.canonical);\n-        assert_eq!(a, \"https://youtube.com/watch?v=dQw4w9WgXcQ\");\n-    }\n-\n-    #[test]\n-    fn legacy_schemeless_upgrades() {\n-        assert_eq!(\n-            canonicalize_raw(\"reddit.com/r/rust/comments/aaa/announcing_rust_199\")\n-                .unwrap()\n-                .canonical,\n-            \"https://reddit.com/r/rust/comments/aaa\"\n-        );\n-    }\n-\n-    #[test]\n-    fn alias_recorded_when_input_differs() {\n-        let r = canonicalize_raw(\"https://youtu.be/abc123\").unwrap();\n-        assert_eq!(r.canonical, \"https://youtube.com/watch?v=abc123\");\n-        assert!(r.alias_of.is_some());\n-    }\n-}\n\n\nSide B — contributor: tommy-mor\nSide B — commit message:\n[bda5f8aa] Remove legacy evidence projection; Evidence envelopes only.\n\nEpoch and commit pages no longer invent history from bare GitDiscovery rows. Production ledger will be wiped to re-emit under the current schema.\n\nCo-authored-by: Cursor <cursoragent@cursor.com>\n\nSide B — unified diff (full patch):\ndiff --git a/constitution.py b/constitution.py\nindex 4dd5b9dfbba231d46289c490f91b1dd5b1018bcf..26ba130e885e0e69fb7874ca5c3f07f42100a150 100644\n--- a/constitution.py\n+++ b/constitution.py\n@@ -210,10 +210,10 @@ class Emission:\n     distributions: dict   # author -> amount str\n     ranking: dict         # author -> score str\n     models_used: list\n-    discovery_snapshot_id: str = \"\"  # empty only for pre-discovery ledger history\n-    evidence_schema_version: int = 1\n-    ranking_run_id: str = \"\"\n-    ranking_event_id: str = \"\"\n+    discovery_snapshot_id: str\n+    evidence_schema_version: int\n+    ranking_run_id: str\n+    ranking_event_id: str\n \n \n @event\n@@ -502,26 +502,6 @@ def _epochs_in_ledger() -> list[int]:\n     return sorted(epochs)\n \n \n-def _legacy_commit_row(commit_id: str) -> tuple[GitDiscovery | None, dict | None]:\n-    for discovery in store.read():\n-        if not isinstance(discovery, GitDiscovery):\n-            continue\n-        for commit in discovery.commits:\n-            if commit_id_for_oid(commit[\"oid\"]) == commit_id:\n-                return discovery, commit\n-    return None, None\n-\n-\n-def _legacy_observation(commit_id: str) -> tuple[GitDiscovery | None, dict | None]:\n-    for discovery in store.read():\n-        if not isinstance(discovery, GitDiscovery):\n-            continue\n-        for obs in discovery.observations:\n-            if commit_id_for_oid(obs[\"oid\"]) == commit_id:\n-                return discovery, obs\n-    return None, None\n-\n-\n def build_pairwise_prompt(side_a: dict, side_b: dict) -> str:\n     return f\"\"\"You are ranking contributions to an open source project.\n Compare these two sides (each may be one or more commits). Decide which side contributed more.\n@@ -2040,7 +2020,7 @@ def _strip_heavy_fields(obj: dict) -> dict:\n \n @app.get(\"/api/ledger\")\n async def get_ledger(offset: int = 0, limit: int = 100, full: int = 0):\n-    \"\"\"List of ledger dicts (backward-compatible). Heavy blobs stripped unless full=1.\"\"\"\n+    \"\"\"List of ledger dicts. Heavy blobs stripped unless full=1.\"\"\"\n     limit = max(1, min(limit, 500))\n     rows = []\n     for e in store.read()[offset:offset + limit]:\n@@ -2274,23 +2254,25 @@ async def epochs_index():\n     epochs = _epochs_in_ledger()\n     rows = []\n     for epoch in epochs:\n-        discovery = _discovery_for_epoch(epoch)\n         emission = _emission_for_epoch(epoch)\n-        evidence_n = sum(\n-            1 for e in evidence_by_kind() if e.epoch == epoch\n+        evidence_n = sum(1 for e in evidence_by_kind() if e.epoch == epoch)\n+        disc = next(\n+            (\n+                e for e in evidence_by_kind(\"git.discovery_completed\")\n+                if e.epoch == epoch\n+            ),\n+            None,\n         )\n         detail = []\n-        if discovery:\n+        if disc:\n             detail.append(\n-                f\"{len(discovery.commits)} eligible / \"\n-                f\"{len(discovery.observations)} observed\"\n+                f\"{disc.payload.get('eligible_count', 0)} eligible / \"\n+                f\"{disc.payload.get('observation_count', 0)} observed\"\n             )\n         if emission:\n             detail.append(f\"emitted {emission.total_emitted}\")\n         if evidence_n:\n             detail.append(f\"{evidence_n} evidence events\")\n-        elif discovery or emission:\n-            detail.append(\"legacy (no Evidence envelopes)\")\n         rows.append([\"li\",\n             _a(_evidence_path(\"epoch\", str(epoch)), f\"epoch {epoch}\"),\n             \" — \",\n@@ -2307,37 +2289,37 @@ async def epochs_index():\n \n @app.get(\"/epochs/{epoch}\")\n async def epoch_detail(epoch: int):\n-    discovery = _discovery_for_epoch(epoch)\n     emission = _emission_for_epoch(epoch)\n     evidence_rows = [e for e in evidence_by_kind() if e.epoch == epoch]\n+    if not evidence_rows and emission is None:\n+        return _evidence_page(f\"epoch {epoch}\", [\n+            _evidence_nav(),\n+            [\"h1\", f\"epoch {epoch}\"],\n+            [\"p.note\", \"No evidence for this epoch.\"],\n+        ])\n+\n     commit_evs = [e for e in evidence_rows if e.kind == \"git.commit\"]\n     comparison_evs = [e for e in evidence_rows if e.kind == \"comparison.input\"]\n     judgment_evs = [e for e in evidence_rows if e.kind == \"llm.judgment\"]\n+    discovery_ev = next(\n+        (e for e in evidence_rows if e.kind == \"git.discovery_completed\"), None\n+    )\n     ranking_started = next(\n         (e for e in evidence_rows if e.kind == \"ranking.started\"), None\n     )\n     ranking_completed = next(\n         (e for e in evidence_rows if e.kind == \"ranking.completed\"), None\n     )\n-    legacy = not evidence_rows and (discovery is not None or emission is not None)\n-\n-    commit_links: list[tuple[str, str]] = []\n-    if commit_evs:\n-        for e in commit_evs:\n-            cid = e.payload.get(\"commit_id\") or \"\"\n-            label = (\n-                f\"{e.payload.get('oid', cid)[:24]} \"\n-                f\"({e.payload.get('contributor', '?')})\"\n-            )\n-            commit_links.append((label, _evidence_path(\"commit\", cid)))\n-    elif discovery:\n-        for c in discovery.commits:\n-            cid = commit_id_for_oid(c[\"oid\"])\n-            commit_links.append((\n-                f\"{c['oid'][:24]} ({c.get('contributor', '?')})\",\n-                _evidence_path(\"commit\", cid),\n-            ))\n \n+    commit_links = [\n+        (\n+            f\"{e.payload.get('oid', e.payload.get('commit_id', ''))[:24]} \"\n+            f\"({e.payload.get('contributor', '?')})\",\n+            _evidence_path(\"commit\", e.payload[\"commit_id\"]),\n+        )\n+        for e in commit_evs\n+        if e.payload.get(\"commit_id\")\n+    ]\n     comparison_links = [\n         (\n             e.payload.get(\"summary\") or e.payload.get(\"comparison_id\", e.event_id),\n@@ -2360,16 +2342,13 @@ async def epoch_detail(epoch: int):\n     ]\n \n     excluded = []\n-    if discovery:\n-        for obs in discovery.observations:\n+    if discovery_ev:\n+        for obs in discovery_ev.payload.get(\"observations\") or []:\n             if obs.get(\"eligible\"):\n                 continue\n             oid = obs.get(\"oid\", \"?\")\n             reason = obs.get(\"exclusion_reason\") or \"excluded\"\n-            excluded.append([\"li\",\n-                f\"{oid[:28]} — {reason} — \",\n-                [\"span.note\", \"legacy evidence unavailable\"],\n-            ])\n+            excluded.append([\"li\", f\"{oid[:28]} — {reason}\"])\n \n     ranking_nodes: list = []\n     if ranking_completed:\n@@ -2388,21 +2367,10 @@ async def epoch_detail(epoch: int):\n                 indent=2, sort_keys=True,\n             )],\n         ]\n-    elif emission:\n-        if legacy and len(emission.ranking or {}) <= 1:\n-            ranking_nodes.append([\"p.note\",\n-                \"Single-contributor epoch — no LLM judgments.\"\n-            ])\n-        ranking_nodes.extend([\n-            [\"p\", \"Projected from Emission (no ranking Evidence event).\"],\n-            [\"pre.blob\", json.dumps(emission.ranking, indent=2, sort_keys=True)],\n-        ])\n+    elif ranking_started:\n+        ranking_nodes = [[\"p.note\", f\"Ranking started: {ranking_started.event_id}\"]]\n     else:\n-        ranking_nodes = [[\"p.note\", \"No ranking recorded.\"]]\n-    if ranking_started and not ranking_completed:\n-        ranking_nodes.insert(0, [\"p.note\",\n-            f\"Ranking started: {ranking_started.event_id}\"\n-        ])\n+        ranking_nodes = [[\"p.note\", \"No ranking evidence.\"]]\n \n     if emission:\n         emission_node = _dl_rows([\n@@ -2411,44 +2379,41 @@ async def epoch_detail(epoch: int):\n             (\"pool_after\", emission.pool_after),\n             (\"discovery_snapshot_id\", emission.discovery_snapshot_id),\n             (\"ranking_run_id\", emission.ranking_run_id or None),\n+            (\"ranking_event_id\", emission.ranking_event_id or None),\n             (\"models_used\", \", \".join(emission.models_used or [])),\n             (\"distributions\", json.dumps(emission.distributions, sort_keys=True)),\n         ])\n     else:\n         emission_node = [\"p.note\", \"No emission for this epoch.\"]\n \n-    single_contributor = False\n-    if discovery:\n-        single_contributor = len({c.get(\"contributor\") for c in discovery.commits}) <= 1\n-    elif emission:\n-        single_contributor = len(emission.ranking or {}) <= 1\n+    contributors = {\n+        e.payload.get(\"contributor\")\n+        for e in commit_evs\n+        if e.payload.get(\"contributor\")\n+    }\n+    no_comparisons_note = \"No comparisons.\"\n+    if len(contributors) <= 1:\n+        no_comparisons_note += \" Single-contributor — no LLM judgments.\"\n \n     body = [\n         _evidence_nav(),\n         [\"div.eyebrow\", f\"epoch {epoch}\"],\n         [\"h1\", f\"epoch {epoch}\"],\n     ]\n-    if legacy:\n-        body.append([\"p.note\",\n-            \"Legacy epoch: projected from GitDiscovery/Emission without Evidence \"\n-            \"envelopes. Eligible commits use discovery patches; discarded observation \"\n-            \"metadata is marked legacy evidence unavailable. Single-contributor \"\n-            \"epochs have no LLM judgments.\"\n-        ])\n-    if discovery:\n+    if discovery_ev:\n         body.extend([\n             [\"h2\", \"discovery\"],\n             _dl_rows([\n-                (\"snapshot_id\", discovery.snapshot_id),\n-                (\"config_digest\", discovery.config_digest),\n-                (\"initial_snapshot\", discovery.initial_snapshot),\n-                (\"observations\", len(discovery.observations)),\n-                (\"eligible\", len(discovery.commits)),\n+                (\"snapshot_id\", discovery_ev.payload.get(\"snapshot_id\")),\n+                (\"config_digest\", discovery_ev.payload.get(\"config_digest\")),\n+                (\"observations\", discovery_ev.payload.get(\"observation_count\")),\n+                (\"eligible\", discovery_ev.payload.get(\"eligible_count\")),\n+                (\"event\", _a(\n+                    _evidence_path(\"event\", discovery_ev.event_id),\n+                    discovery_ev.event_id,\n+                )),\n             ]),\n         ])\n-    no_comparisons_note = \"No comparisons.\"\n-    if single_contributor:\n-        no_comparisons_note += \" Single-contributor — no LLM judgments.\"\n     body.extend([\n         [\"h2\", \"commits\"],\n         _link_list(commit_links),\n@@ -2471,92 +2436,42 @@ async def epoch_detail(epoch: int):\n @app.get(\"/commits/{commit_id}\")\n async def commit_detail(commit_id: str):\n     ev = find_evidence_payload(\"git.commit\", \"commit_id\", commit_id)\n-    discovery, legacy_row = (None, None)\n     if not ev:\n-        discovery, legacy_row = _legacy_commit_row(commit_id)\n-    if not ev and not legacy_row:\n-        discovery, obs = _legacy_observation(commit_id)\n-        if obs is not None:\n-            epoch = discovery.epoch if discovery else \"?\"\n-            return _evidence_page(f\"commit {commit_id[:24]}\", [\n-                _evidence_nav(\n-                    _a(_evidence_path(\"epoch\", str(epoch)), f\"epoch {epoch}\")\n-                ),\n-                [\"div.eyebrow\", \"commit\"],\n-                [\"h1\", commit_id],\n-                [\"p.note\", \"legacy evidence unavailable\"],\n-                _dl_rows([\n-                    (\"oid\", obs.get(\"oid\")),\n-                    (\"eligible\", obs.get(\"eligible\")),\n-                    (\"exclusion_reason\", obs.get(\"exclusion_reason\")),\n-                    (\"epoch\", str(epoch)),\n-                ]),\n-            ])\n         return _evidence_page(\"commit not found\", [\n             _evidence_nav(),\n             [\"h1\", \"commit not found\"],\n             [\"p\", commit_id],\n         ])\n-    if ev:\n-        p = ev.payload\n-        epoch = ev.epoch\n-        oid = p.get(\"oid\", \"\")\n-        contributor = p.get(\"contributor\", \"\")\n-        message = _blob_text(p.get(\"message\"))\n-        patch = _blob_text(p.get(\"patch\"))\n-        meta = _dl_rows([\n+    p = ev.payload\n+    epoch = ev.epoch\n+    return _evidence_page(f\"commit {commit_id[:24]}\", [\n+        _evidence_nav(_a(_evidence_path(\"epoch\", str(epoch)), f\"epoch {epoch}\")),\n+        [\"div.eyebrow\", \"commit\"],\n+        [\"h1\", commit_id],\n+        _dl_rows([\n             (\"commit_id\", commit_id),\n-            (\"oid\", oid),\n-            (\"contributor\", contributor),\n+            (\"oid\", p.get(\"oid\", \"\")),\n+            (\"contributor\", p.get(\"contributor\", \"\")),\n             (\"patch_sha256\", p.get(\"patch_sha256\")),\n             (\"patch_identity\", p.get(\"patch_identity\")),\n             (\"committer_timestamp_ms\", p.get(\"committer_timestamp_ms\")),\n             (\"evidence_event\", _a(_evidence_path(\"event\", ev.event_id), ev.event_id)),\n             (\"epoch\", _a(_evidence_path(\"epoch\", str(epoch)), str(epoch))),\n-        ])\n-        legacy_note = None\n-    else:\n-        assert legacy_row is not None and discovery is not None\n-        epoch = discovery.epoch\n-        oid = legacy_row.get(\"oid\", \"\")\n-        contributor = legacy_row.get(\"contributor\", \"\")\n-        message = legacy_row.get(\"message\") or \"\"\n-        patch = legacy_row.get(\"patch\") or \"\"\n-        meta = _dl_rows([\n-            (\"commit_id\", commit_id),\n-            (\"oid\", oid),\n-            (\"contributor\", contributor),\n-            (\"patch_sha256\", legacy_row.get(\"patch_sha256\")),\n-            (\"patch_identity\", legacy_row.get(\"patch_identity\")),\n-            (\"committer_timestamp_ms\", legacy_row.get(\"committer_timestamp_ms\")),\n-            (\"epoch\", _a(_evidence_path(\"epoch\", str(epoch)), str(epoch))),\n-            (\"source\", \"legacy GitDiscovery projection\"),\n-        ])\n-        legacy_note = [\"p.note\", \"Projected from GitDiscovery — Evidence envelope absent.\"]\n-    return _evidence_page(f\"commit {commit_id[:24]}\", [\n-        _evidence_nav(_a(_evidence_path(\"epoch\", str(epoch)), f\"epoch {epoch}\")),\n-        [\"div.eyebrow\", \"commit\"],\n-        [\"h1\", commit_id],\n-        *([legacy_note] if legacy_note else []),\n-        meta,\n+        ]),\n         [\"p\", _a(f\"/commits/{commit_id}/patch\", \"download patch\")],\n         [\"h2\", \"message\"],\n-        _pre_blob(message),\n+        _pre_blob(_blob_text(p.get(\"message\"))),\n         [\"h2\", \"patch\"],\n-        _pre_blob(patch),\n+        _pre_blob(_blob_text(p.get(\"patch\"))),\n     ])\n \n \n @app.get(\"/commits/{commit_id}/patch\")\n async def commit_patch_download(commit_id: str):\n     ev = find_evidence_payload(\"git.commit\", \"commit_id\", commit_id)\n-    if ev:\n-        raw = _decode_blob(ev.payload.get(\"patch\")) or _blob_text(ev.payload.get(\"patch\")).encode()\n-    else:\n-        _, row = _legacy_commit_row(commit_id)\n-        if not row:\n-            return PlainTextResponse(\"not found\", status_code=404)\n-        raw = (row.get(\"patch\") or \"\").encode(\"utf-8\")\n+    if not ev:\n+        return PlainTextResponse(\"not found\", status_code=404)\n+    raw = _decode_blob(ev.payload.get(\"patch\")) or _blob_text(ev.payload.get(\"patch\")).encode()\n     return Response(\n         content=raw,\n         media_type=\"text/plain; charset=utf-8\",\n@@ -3226,7 +3141,9 @@ async def watch():\n                 [\"div.controls\",\n                     [\"button#play\", {\"type\": \"button\", \"disabled\": \"true\"}, \"▶ Play live feed\"],\n                     [\"button#pause\", {\"type\": \"button\"}, \"Ⅱ Pause feed\"],\n-                    [\"span.note\", \"Pause stops local updates; the constitutional process continues.\"],\n+                    [\"span.note\",\n+                     \"Play/pause only affect this browser feed — they do not run or stop emission. \"\n+                     \"The server emits at each epoch boundary; status above is that process.\"],\n                 ],\n             ],\n             [\"section.panel\",\ndiff --git a/tests/integration.clj b/tests/integration.clj\nindex 204b0fedfbad57846205cb140c4ed9406b5f8e0e..11140e95a8cd86768a661a30e6b29a3ddfc95fcc 100644\n--- a/tests/integration.clj\n+++ b/tests/integration.clj\n@@ -247,7 +247,10 @@\n                :decay_rate   \"0.003253356063468\"\n                :distributions {\"alice\" \"381.4282558872\" \"bob\" \"190.7141279436\"}\n                :ranking       {\"alice\" \"0.6666\" \"bob\" \"0.3334\"}\n-               :models_used   [\"mock/chat-v1\" \"mock/chat-v2\"]}]\n+               :models_used   [\"mock/chat-v1\" \"mock/chat-v2\"]\n+               :evidence_schema_version 2\n+               :ranking_run_id \"seed-rank\"\n+               :ranking_event_id \"seed-rank-ev\"}]\n     (spit path (str (json/generate-string entry) \"\\n\"))))\n \n ;; ---------------------------------------------------------------------------\ndiff --git a/tests/test_evidence.py b/tests/test_evidence.py\nindex 76adcd343eec3a65dec58fda93b068356fb1adcd..7cb74fd7fb1bcd0ab17d2cbe2e6ca7e61e164221 100644\n--- a/tests/test_evidence.py\n+++ b/tests/test_evidence.py\n@@ -1,4 +1,4 @@\n-\"\"\"HTML evidence graph: byte fidelity, resume, legacy projection, private ack.\"\"\"\n+\"\"\"HTML evidence graph: byte fidelity, resume, and Evidence-only pages.\"\"\"\n \n from __future__ import annotations\n \n@@ -86,55 +86,10 @@ def test_html_evidence_pages_escape_and_link(evidence_store):\n     assert patch_resp.headers[\"content-disposition\"].startswith(\"attachment\")\n \n \n-def test_legacy_epoch_projects_from_gitdiscovery_without_evidence(evidence_store):\n-    oid = \"sha1:\" + \"b\" * 40\n-    discovery = c.GitDiscovery(\n-        schema_version=1,\n-        epoch=3,\n-        snapshot_id=\"legacy-snap\",\n-        timestamp_ms=1,\n-        config_digest=\"d\",\n-        initial_snapshot=True,\n-        configuration={\"repositories\": [], \"contributors\": {}},\n-        repositories=[],\n-        observations=[{\n-            \"oid\": oid,\n-            \"eligible\": False,\n-            \"exclusion_reason\": \"before_genesis\",\n-            \"first_sources\": [],\n-        }, {\n-            \"oid\": \"sha1:\" + \"c\" * 40,\n-            \"eligible\": True,\n-            \"exclusion_reason\": None,\n-            \"first_sources\": [],\n-        }],\n-        commits=[{\n-            \"oid\": \"sha1:\" + \"c\" * 40,\n-            \"contributor\": \"tommy-mor\",\n-            \"message\": \"eligible\",\n-            \"patch\": \"diff --git a/x b/x\\n\",\n-        }],\n-    )\n-    emission = c.Emission(\n-        epoch=3,\n-        timestamp_ms=2,\n-        pool_before=\"1\",\n-        total_emitted=\"0.1\",\n-        pool_after=\"0.9\",\n-        decay_rate=\"0.1\",\n-        distributions={\"tommy-mor\": \"0.1\"},\n-        ranking={\"tommy-mor\": \"1\"},\n-        models_used=[],\n-        discovery_snapshot_id=\"legacy-snap\",\n-    )\n-    asyncio.run(c.store.append(discovery))\n-    asyncio.run(c.store.append(emission))\n-    html = asyncio.run(c.epoch_detail(3)).body.decode()\n-    assert \"legacy\" in html.lower()\n-    assert \"Single-contributor\" in html or \"no LLM\" in html\n-    excluded_id = c.commit_id_for_oid(oid)\n-    excluded_html = asyncio.run(c.commit_detail(excluded_id)).body.decode()\n-    assert \"legacy evidence unavailable\" in excluded_html.lower()\n+def test_commit_without_evidence_is_not_found(evidence_store):\n+    html = asyncio.run(c.commit_detail(\"c_missing\")).body.decode()\n+    assert \"commit not found\" in html\n+    assert \"legacy\" not in html.lower()\n \n \n def test_ranking_resume_skips_duplicate_provider_calls(evidence_store, monkeypatch):\n@@ -202,6 +157,10 @@ def test_epochs_index_lists_epochs(evidence_store):\n         distributions={},\n         ranking={},\n         models_used=[],\n+        discovery_snapshot_id=\"snap\",\n+        evidence_schema_version=c.EVIDENCE_SCHEMA_VERSION,\n+        ranking_run_id=\"r\",\n+        ranking_event_id=\"e\",\n     )))\n     html = asyncio.run(c.epochs_index()).body.decode()\n     assert \"/epochs/3\" in html\n","role":"user"}],"model":"~anthropic/claude-sonnet-latest"}