constitution · epochs · watch · epoch 3

comparison

c_8dc1a8119370 (tommy-mor) vs c_6209cd238b3f (tommy-mor)

download prompt · raw event · cmp_d58439f80d12a9

council reasoning

~anthropic/claude-sonnet-latest · winner B · 63:37 · permalink

Side B fixes a real correctness/perf bug (scan was replaying full rank-centrality per ingest, now a fast single-pass parse check), surfaces actual parse_error detail instead of a vague reason, and adds a genuinely useful --ingest single-event replay feature with tests. Side A is largely a deletion of a complex-but-working keystroke parser graph and its dedicated race-condition test in favor of a much simpler paste-and-go textarea, which is defensible simplification but net removes substantial tested functionality without adding comparably durable new capability.

~x-ai/grok-latest · winner A · 2:1 · permalink

A replaces an unreliable ~1.8k-line keystroke graph, ParserAction surface, racey JS, and Playwright race test with a small paste-and-go URL parser and redirect—removing failed complexity and leaving a durable navigation path. B meaningfully speeds scan (parse-only, no full replay), surfaces full parse_error detail, and adds compile --ingest, but those are incremental offline-tooling fixes versus A’s structural product/design simplification.

openai/gpt-chat-latest · winner B · 4:1 · permalink

Side B adds durable tooling improvements: it refactors log scanning into a fast parse-only pass, surfaces detailed DSL parse errors via new `parse_error` fields, and introduces `compile --ingest` to replay prior state and compile a single ingest from an event log, with corresponding CLI validation and reporting. Side A mainly removes a complex autocomplete/parser system in favor of a simpler paste-and-go textarea and redirect, which simplifies the UI but also drops substantial functionality rather than extending core project capabilities.

sides

A — c_8dc1a8119370 (tommy-mor)

message

[529cc941] Replace autocomplete parser with paste-and-go navigate.

The keystroke transition graph was unreliable; a textarea plus Go button now parses pasted Reddit URLs and redirects to the subreddit ranking scope.

Co-authored-by: Cursor <cursoragent@cursor.com>

diff preview

diff --git a/AGENTS.md b/AGENTS.md
index 77f2e31d4e860a92a77255ca5106c8b6c4510ee7..36ee4c0ec700bffbe226ee775ba9cf59cf35c770 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -11,7 +11,6 @@ Single Rust web app **`sorter2-server`**: pairwise voting, rank-centrality ranki
 - **Rust 1.88+** is required (some transitive crates need a recent Cargo). The image may ship older `/usr/local/cargo` (1.83); use **rustup** and `rustup default 1.88.0` before building.
 - **System packages** for builds: `pkg-config`, `libssl-dev` (for `reqwest` / OpenSSL in integration tests and release builds).
 - **Clojure CLI 1.12.0.1530** (optional but used in CI): install from https://clojure.org/guides/install_clojure — needed for `./scripts/clj-test.sh` / Kaocha tests.
-- **Playwright browser** for the spel browser test (`test/parser_race.clj`): install once with `clojure -M -e "(com.microsoft.playwright.CLI/main (into-array String [\"install\" \"chromium\" \"--with-deps\"]))"`. The browser binary is cached under `~/.cache/ms-playwright`.
 
 ### Commands (see also `TEST.sh`)
 
diff --git a/server/src/api/ui_html.rs b/server/src/api/ui_html.rs
index 1339048c955c0a3eb5120381aaf031424cbed540..c4ab9d65c7b3cd42a5b4d093ba429993c101e9a8 100644
--- a/server/src/api/ui_html.rs
+++ b/server/src/api/ui_html.rs
@@ -8,7 +8,7 @@ use std::collections::HashMap;
 use crate::{
     html::{js_string_literal, ranking_panel, JsBuilder},
     parser::parse_reddit_url,
-    parser_render::parser_panel_morph,
+    parser_render::navigate_panel,
     state::AppState,
     ui_action::{parse_html_ui_from_form, HtmlUiAction},
 };
@@ -57,18 +57,23 @@ pub async fn post_ui_html(
                 .morph_selector("#ranking-panel", panel)
                 .into_response()
         }
-        HtmlUiAction::ParseQuery { query } => {
-            let action = parse_reddit_url(&query);
-            let panel = parser_panel_morph(&query, &action);
-            let mut js = JsBuilder::new().morph_selector("#parser-panel", panel);
-            if let Some(comp) = action.primary_completion() {
-                js = js.raw(&format!(
-                    "var __pi=document.getElementById('parser-input'); if(__pi){{__pi.dataset.completion={};}}",
-                    js_string_literal(comp)
-                ));
+        HtmlUiAction::ParseQuery { query } => match parse_reddit_url(&query) {
+            Ok(subreddit) => {
+                let dest = format!("/?sub={subreddit}");
+                JsBuilder::new()
+                    .raw(&format!(
+                        "window.location.href={};",
+                        js_string_literal(&dest)
+                    ))
+                    .into_response()
             }
-            js.into_response()
-        }
+            Err(message) => {
+                let panel = navigate_panel(&query, Some(&message));
+                JsBuilder::new()
+                    .morph_selector("#parser-panel", panel)
+                    .into_response()
+            }
+        },
     }
 }
 
diff --git a/server/src/html/mod.rs b/server/src/html/mod.rs
index 94a5cfb561d1c8464bd2782f7ffd4e0965ccf95d..9650d333d29c4ac94ceb407aee3ee00399c7f40b 100644
--- a/server/src/html/mod.rs
+++ b/server/src/html/mod.rs
@@ -11,8 +11,7 @@ use serde::Deserialize;
 
 use crate::{
     form_template::template_json_compact,
-    parser_action::ParserAction,
-    parser_render::parser_panel,
+    parser_render::navigate_panel,
     ranking::{top_bottom, RankedItem},
     reducer::GroupState,
     state::{normalize_scope, AppState},
@@ -336,10 +335,9 @@ pub async fn home(
     let empty = GroupState::new();
     let group = groups.get(&scope).unwrap_or(&empty);
 
-    let empty_action = ParserAction::suggest(String::new(), None);
     let body = html! {
         h1 { "sorter2" }
-        (parser_panel("", &empty_action))
+        (navigate_panel("", None))
         (vote_panel(&scope))
         (ranking_panel(&scope, group))
     };
diff --git a/server/src/lib.rs b/server/src/lib.rs
index fa423640d598f4ba97a5885d228e78d7b97f7a22..de8bca48cbf689cad22337883e7791966e7c4919 100644
--- a/server/src/lib.rs
+++ b/server/src/lib.rs
@@ -4,7 +4,6 @@ pub mod events;
 pub mod form_template;
 pub mod html;
 pub mod parser;
-pub mod parser_action;
 pub mod parser_render;
 pub mod path_types;
 pub mod ranking;
diff --git a/server/src/parser.rs b/server/src/parser.rs
index ea437c4434045b44cba04a2b3416df850db518e7..50571a59f0d3ece1e2538f88e00ef46ec40ea545 100644
--- a/server/src/parser.rs
+++ b/server/src/parser.rs
@@ -1,1811 +1,87 @@
-use std::collections::HashMap;
-use std::sync::OnceLock;
+//! Extract a subreddit name from a pasted Reddit URL or path.
 
-use crate::parser_action::{GuideOption, ParserAction, ScrollingSuggestion, Suggestion};
-
-// --- Core Abstractions ---
-
-/// Unique identifier for nodes in the graph
-type NodeId = &'static str;
-
-/// Pattern matching for edges
-#[derive(Debug, Clone)]
-pub enum EdgePattern {
-    /// Matches exact literal string
-    Literal(&'static str),
-    
-    /// Matches any prefix of a string and suggests the full string
-    /// e.g., PrefixOf("reddit.com") matches "r", "re", "red", "reddit", "reddit.com"
-    PrefixOf(&'static str),
-    
-    /// Captures a variable segment (e.g., subreddit name, username)
-    Variable(&'static str),
-    
-    /// Matches any string (wildcard)
-    Any,
-}
-
-impl EdgePattern {
-    /// Try to match this pattern against input, return (consumed_chars, captured_value)
-    fn matches(&self, input: &str) -> Option<(usize, Option<String>)> {
-        match self {
-            EdgePattern::Literal(lit) => {
-                if input.starts_with(lit) {
-                    Some((lit.len(), None))
-                } else {
-                    None
-                }
-            }
-            EdgePattern::PrefixOf(target) => {
-                // Check if input is a prefix of target
-                if target.starts_with(input) && !input.is_empty() {
-                    // It's a valid prefix
-                    Some((input.len(), None))
-                } else if input.starts_with(target) {
-                    // Full match
-                    Some((target.len(), None))
-                } else {
-                    None
-                }
-            }
-            EdgePattern::Variable(var_name) => {
-                // Consume until next '/' or end of string
-                let end = input.find('/').unwrap_or(input.len());
-                if end > 0 {
-                    let captured = input[..end].to_string();
-                    // Validate based on variable type
-                    if is_valid_variable(var_name, &captured) {
-                        Some((end, Some(captured)))
-                    } else {
-                        None
-                    }
-                } else {
-                    None
-                }
-            }
-            EdgePattern::Any => {
-                // Match everything until next '/' or end
-                let end = input.find('/').unwrap_or(input.len());
-                if end > 0 {
-                    Some((end, Some(input[..end].to_string())))
-                } else {
-                    None
-                }
-            }
-        }
-    }
-    
-    /// Get the completion suggestion for this pattern
-    fn completion(&self, partial: &str) -> Option<String> {
-        match self {
-            EdgePattern::PrefixOf(target) => {
-                if target.starts_with(partial) && partial != *target {
-                    Some(target.to_string())
-                } else {
-                    None
-                }
-            }
-            _ => None,
-        }
+pub fn parse_reddit_url(query: &str) -> Result<String, String> {
+    let q = query.trim();
+    if q.is_empty() {
+        return Err("Paste a Reddit URL or r/subreddit path".into());
     }
-}
 
-/// Edge in the graph
-pub struct Edge {
-    pattern: EdgePattern,
-    target: NodeId,
-    /// Optional description for autocomplete
-    description: Option<&'static str>,
-}
-
-/// Handler function for generating UI actions (Send + Sync so the graph can live in `OnceLock`).
-type Handler = Box<dyn Fn(&str, &str, &HashMap<String, String>) -> ParserAction + Send + Sync>;
-
-/// Node in the graph
-pub struct Node {
-    #[allow(dead_code)]
-    id: NodeId,
-    edges: Vec<Edge>,
-    handler: Option<Handler>,
-}
-
-/// The composable parser graph (immutable after `build`).
-pub struct Graph {
-    nodes: HashMap<NodeId, Node>,
-    root: NodeId,
-}
-
-// --- Graph Builder (Fluent API) ---
-
-pub struct GraphBuilder {
-    nodes: HashMap<NodeId, Node>,
-    current_node: Option<NodeId>,
-    root: NodeId,
-}
-
-impl GraphBuilder {
-    pub fn new() -> Self {
-        let mut nodes = HashMap::new();
-        nodes.insert(
-            "root",
-            Node {
-                id: "root",
-                edges: Vec::new(),
-                handler: None,
-            },
-        );
-
-        GraphBuilder {
-            nodes,
-            current_node: Some("root"),
-            root: "root",
-        }
+    if let Some(sub) = subreddit_after_prefix(q, "r/") {
+        return Ok(sub);
     }
 
-    /// Select a node to add edges to
-    pub fn at(mut self, node_id: NodeId) -> Self {
-        self.nodes.entry(node_id).or_insert_with(|| Node {
-            id: node_id,
-            edges: Vec::new(),
-            handler: None,
-        });
-        self.current_node = Some(node_id);
-        self
+    if let Some(sub) = subreddit_from_path_segment(q, "/r/") {
+        return Ok(sub);
     }
-    
-    /// Add an edge from the current node
-    pub fn edge(self, pattern: EdgePattern, target: NodeId) -> Self {
-        self.edge_with_desc(pattern, target, None)
-    }
-    
-    /// Add an edge with description
-    pub fn edge_with_desc(
-        mut self,
-        pattern: EdgePattern,
-        target: NodeId,
-        desc: Option<&'static str>,
-    ) -> Self {
-        let current = self.current_node.expect("No current node selected");
-
-        self.nodes.entry(target).or_insert_with(|| Node {
-            id: target,
-            edges: Vec::new(),
-            handler: None,
-        });
-
-        if let Some(node) = self.nodes.get_mut(current) {
-            node.edges.push(Edge {
-                pattern,
-                target,
-                description: desc,
-            });
-        }
 
-        self
-    }
-
-    /// Set handler for current node
-    pub fn handler<F>(mut self, handler: F) -> Self
-    where
-        F: Fn(&str, &str, &HashMap<String, String>) -> ParserAction + Send + Sync + 'static,
-    {
-        let current = self.current_node.expect("No current node selected");
-        if let Some(node) = self.nodes.get_mut(current) {
-            node.handler = Some(Box::new(handler));
-        }
-        self
-    }
-    
-    /// Build the final graph
-    pub fn build(self) -> Graph {
-        Graph {
-            nodes: self.nodes,
-            root: self.root,
-        }
-    }
+    Err("Could not find a subreddit in that URL".into())
 }
 
-// --- Parser Implementation ---
-
-impl Graph {
-    pub fn parse(&self, input: &str) -> ParserAction {
-        let normalized = input.trim().to_lowercase();
-        let mut state = ParserState {
-            input: &normalized,
-            cursor: 0,
-            current_node_id: self.root,
-            context: HashMap::new(),
-            original_query: input.to_string(),
-            current_prefix: String::new(),
-        };
-        
-        self.parse_recursive(&mut state)
-    }
-    
-    fn parse_recursive(&self, state: &mut ParserState) -> ParserAction {
-        let node = self
-            .nodes
-            .get(state.current_node_id)
-            .expect("Node not found in graph");
-
-        // If we've consumed all input, check for handler or suggestions
-        if state.cursor >= state.input.len() {
-            if let Some(handler) = &node.han

… preview truncated; 92,533 characters omitted

download full diff A

B — c_6209cd238b3f (tommy-mor)

message

[6e344666] Improve sorterc scan speed, errors, and ingest compile.

Make scan a fast DSL parse pass with human-readable output, surface full parse_error details, and add compile --ingest for single-event replay from a log.

Co-authored-by: Cursor <cursoragent@cursor.com>

diff preview

diff --git a/server/src/offline.rs b/server/src/offline.rs
index 54ad0ded096a305ef8454ab2cdd1c3af71b14f5d..2db6f67e22e00a24ce673d13095644dd9fa9342d 100644
--- a/server/src/offline.rs
+++ b/server/src/offline.rs
@@ -28,6 +28,10 @@ pub struct CompileResult {
     pub threads: Vec<String>,
     pub rankings: Vec<CheckScopeRanking>,
     pub stats: CompileStats,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub ingest_id: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub ingest_line: Option<usize>,
 }
 
 #[derive(Debug, Clone, Serialize)]
@@ -36,6 +40,8 @@ pub struct CompileError {
     pub error: String,
     #[serde(skip_serializing_if = "Option::is_none")]
     pub hint: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub parse_error: Option<String>,
 }
 
 #[derive(Debug, Clone, Serialize)]
@@ -50,7 +56,7 @@ pub struct MalformedIngest {
     pub id: String,
     pub room_id: String,
     pub thread_tag: String,
-    pub reason: String,
+    pub parse_error: String,
 }
 
 #[derive(Debug, Clone, Serialize)]
@@ -59,9 +65,36 @@ pub struct ScanResult {
     pub path: String,
     pub total_lines: usize,
     pub parsed_events: usize,
+    pub ingest_events: usize,
     pub bad_json_lines: Vec<BadJsonLine>,
     pub malformed_ingests: Vec<MalformedIngest>,
-    pub skipped_ingests: usize,
+}
+
+#[derive(Debug)]
+pub enum CompileIngestError {
+    NotFound(String),
+    Io(std::io::Error),
+    Compile(CompileError),
+}
+
+impl CompileIngestError {
+    pub fn into_compile_error(self) -> CompileError {
+        match self {
+            Self::NotFound(id) => CompileError {
+                ok: false,
+                error: format!("ingest not found: {id}"),
+                hint: Some("pass the ingest event id from events.jsonl".into()),
+                parse_error: None,
+            },
+            Self::Io(e) => CompileError {
+                ok: false,
+                error: format!("io error: {e}"),
+                hint: None,
+                parse_error: None,
+            },
+            Self::Compile(e) => e,
+        }
+    }
 }
 
 fn document_stats(doc: &dsl::Document) -> CompileStats {
@@ -166,19 +199,22 @@ fn rankings_for_simulated(
         .collect()
 }
 
-/// Validate and simulate one `.sorter` document against optional base reducer state.
-pub fn compile_document(
+fn compile_document_inner(
     base: &ReducerState,
     room: &str,
     text: &str,
+    ingest_id: Option<String>,
+    ingest_line: Option<usize>,
 ) -> Result<CompileResult, CompileError> {
     let room_key = room.trim();
     let scope = scope_from_room_wire(room_key);
     let validated = validate_ingest_document(base, text, &scope).map_err(|(_, message, hint)| {
+        let parse_error = dsl::parse_full(text).err().map(|e| e.to_string());
         CompileError {
             ok: false,
             error: message,
             hint,
+            parse_error,
         }
     })?;
 
@@ -200,15 +236,27 @@ pub fn compile_document(
         threads: threads_in_document(text),
         rankings: rankings_for_simulated(&simulated, &scope, room_key, &validated.doc),
         stats: document_stats(&validated.doc),
+        ingest_id,
+        ingest_line,
     })
 }
 
+/// Validate and simulate one `.sorter` document against optional base reducer state.
+pub fn compile_document(
+    base: &ReducerState,
+    room: &str,
+    text: &str,
+) -> Result<CompileResult, CompileError> {
+    compile_document_inner(base, room, text, None, None)
+}
+
 fn ingest_parse_error(raw: &str) -> Option<String> {
     dsl::parse_full(raw).err().map(|e| e.to_string())
 }
 
-fn load_events_from_jsonl(path: &Path) -> Result<(Vec<(usize, Event)>, Vec<BadJsonLine>), std::io::Error> {
+fn load_events_from_jsonl(path: &Path) -> Result<(usize, Vec<(usize, Event)>, Vec<BadJsonLine>), std::io::Error> {
     let text = std::fs::read_to_string(path)?;
+    let total_lines = text.lines().count();
     let mut events = Vec::new();
     let mut bad_json_lines = Vec::new();
     for (idx, line) in text.lines().enumerate() {
@@ -225,61 +273,90 @@ fn load_events_from_jsonl(path: &Path) -> Result<(Vec<(usize, Event)>, Vec<BadJs
             }),
         }
     }
-    Ok((events, bad_json_lines))
+    Ok((total_lines, events, bad_json_lines))
 }
 
-/// Replay a JSONL event log into reducer state (same rules as server boot).
-pub fn load_reducer_from_jsonl(path: &Path) -> Result<(ReducerState, Vec<BadJsonLine>), std::io::Error> {
-    let (events, bad_json_lines) = load_events_from_jsonl(path)?;
+fn replay_events(events: &[(usize, Event)]) -> ReducerState {
     let mut state = ReducerState::default();
     for (_line_no, ev) in events {
-        state.apply_event(ev);
+        state.apply_event(ev.clone());
     }
-    Ok((state, bad_json_lines))
+    state
 }
 
-/// Scan an events.jsonl for corrupt JSON lines and ingests that fail DSL replay.
-pub fn scan_jsonl(path: &Path) -> Result<ScanResult, std::io::Error> {
-    let text = std::fs::read_to_string(path)?;
-    let total_lines = text.lines().count();
-    let (events, bad_json_lines) = load_events_from_jsonl(path)?;
+/// Replay a JSONL event log into reducer state (same rules as server boot).
+pub fn load_reducer_from_jsonl(path: &Path) -> Result<(ReducerState, Vec<BadJsonLine>), std::io::Error> {
+    let (_total_lines, events, bad_json_lines) = load_events_from_jsonl(path)?;
+    Ok((replay_events(&events), bad_json_lines))
+}
 
-    let mut malformed_ingests = Vec::new();
-    let mut skipped_ingests = 0usize;
-    let mut state = ReducerState::default();
-    let parsed_events = events.len();
+/// Find one ingest in a log and compile it against all prior events as base state.
+pub fn compile_ingest_from_log(path: &Path, ingest_id: &str) -> Result<CompileResult, CompileIngestError> {
+    let (_total_lines, events, bad_json_lines) = load_events_from_jsonl(path).map_err(CompileIngestError::Io)?;
+    if !bad_json_lines.is_empty() {
+        return Err(CompileIngestError::Compile(CompileError {
+            ok: false,
+            error: format!("jsonl has {} corrupt line(s)", bad_json_lines.len()),
+            hint: Some("fix the log or use `sorterc scan`".into()),
+            parse_error: None,
+        }));
+    }
+
+    let needle = ingest_id.trim();
+    let mut found: Option<(usize, Ingest)> = None;
+    let mut prior: Vec<(usize, Event)> = Vec::new();
 
     for (line_no, ev) in events {
         if let Event::Ingest(ref ing) = ev {
-            if let Some(reason) = ingest_parse_error(&ing.raw) {
+            if ing.id == needle {
+                found = Some((line_no, ing.clone()));
+                break;
+            }
+        }
+        prior.push((line_no, ev));
+    }
+
+    let (line_no, ing) = found.ok_or_else(|| CompileIngestError::NotFound(needle.to_string()))?;
+    let base = replay_events(&prior);
+    compile_document_inner(&base, &ing.room_id, &ing.raw, Some(ing.id.clone()), Some(line_no))
+        .map_err(CompileIngestError::Compile)
+}
+
+/// Scan an events.jsonl for corrupt JSON lines and ingests whose DSL fails to parse.
+///
+/// This does not replay the log (which would run rank centrality on every ingest and
+/// can take minutes on real logs). It matches what the server skips on boot: parse failure.
+pub fn scan_jsonl(path: &Path) -> Result<ScanResult, std::io::Error> {
+    let (total_lines, events, bad_json_lines) = load_events_from_jsonl(path)?;
+
+    let mut malformed_ingests = Vec::new();
+    let mut ingest_events = 0usize;
+
+    for (line_no, ev) in &events {
+        if let Event::Ingest(ing) = ev {
+            ingest_events += 1;
+            if let Some(parse_error) = ingest_parse_error(&ing.raw) {
                 malformed_ingests.push(MalformedIngest {
-                    line: line_no,
+                    line: *line_no,
                     id: ing.id.clone(),
                     room_id: ing.room_id.clone(),
                     thread_tag: ing.thread_tag.clone(),
-                    reason,
+                    parse_error,
                 });
             }
-            let before = state.ingests_by_id.len();
-            state.apply_event(ev);
-            if state.ingests_by_id.len() == before {
-                skipped_ingests += 1;
-            }
-        } else {
-            state.apply_event(ev);
         }
     }
 
-    let ok = bad_json_lines.is_empty() && malformed_ingests.is_empty() && skipped_ingests == 0;
+    let ok = bad_json_lines.is_empty() && malformed_ingests.is_empty();
 
     Ok(ScanResult {
         ok,
         path: path.display().to_string(),
         total_lines,
-        parsed_events,
+        parsed_events: events.len(),
+        ingest_events,
         bad_json_lines,
         malformed_ingests,
-        skipped_ingests,
     })
 }
 
@@ -330,4 +407,25 @@ mod tests {
         assert!(!report.ok);
         assert_eq!(report.bad_json_lines.len(), 1);
     }
+
+    #[test]
+    fn scan_reports_dsl_parse_error_detail() {
+        let dir = tempfile::tempdir().unwrap();
+        let path = dir.path().join("events.jsonl");
+        let ingest = serde_json::json!({
+            "type": "ingest",
+            "ts": 1,
+            "id": "bad-ingest-id",
+            "raw": "{ no closing brace\n~/a { body }\n~/a 1:0 ~/b",
+            "principal": "test",
+            "room_id": "public",
+            "thread_tag": "t",
+        });
+        std::fs::write(&path, format!("{ingest}\n")).unwrap();
+        let report = scan_jsonl(&path).unwrap();
+        assert!(!report.ok);
+        assert_eq!(report.malformed_ingests.len(), 1);
+        assert_eq!(report.malformed_ingests[0].id, "bad-ingest-id");
+        assert!(report.malformed_ingests[0].parse_error.contains("parse error"));
+    }
 }
diff --git a/sorterc/readme.md b/sorterc/readme.md
index 1ebcc3fc935541ea9e47e0458ec67a750fe19fff..e388615c34b40914ca51fc7a79cb738eebc2909b 100644
--- a/sorterc/readme.md
+++ b/sorterc/readme.md
@@ -60,21 +60,33 @@ Rankings use the same structure as the server's dry-run check: parent scope, con
 
 ### `scan` — lint an `events.jsonl`
 
-Reads a JSONL event log and reports problems without starting a server.
+Fast single-pass check. Does **not** replay the log (replay runs rank centrality on every ingest and gets slow fast).
 
 ```bash
 cargo run -p sorterc -- scan events.jsonl
-cargo run -p sorterc -- scan events.jsonl --pretty
+cargo run -p sorterc -- scan events.jsonl --json
+cargo run -p sorterc -- scan events.jsonl --json --pretty
 ```
 
+Default output is human-readable with a blank line between each problem. Use `--json` for machine output.
+
 Reports:
 
 - **bad JSON lines** — lines that are not valid JSON
-- **malformed ingests** — ingest events whose `raw` DSL fails to parse
-- **skipped ingests** — ingests dropped during replay (same behavior as server boot)
+- **malformed ingests** — ingest events whose `raw` DSL fails to parse, with full `parse_error` text
 
 Exits 0 when clean, 1 when any issue is found.
 
+### `compile --ingest` — compile one event from a log
+
+Replay all events **before** the target ingest as base state, then compile that ingest's DSL:
+
+```bash
+cargo run -p sorterc -- compile --ingest cabd8adc-57ae-402d-a940-8e24339ac451 --from events.jsonl --pretty
+```
+
+Output includes `ingest_id`, `ingest_line`, and rankings for that post only. This may take a while for ingests late in a large log (full replay up to that point).
+
 ## Typical uses
 
 - Iterate on `.sorter` files in an editor and pipe through `compile` to see rankings instantly
diff --git a/sorterc/src/main.rs b/sorterc/src/main.rs
index 71382c180085cb0ad71043c852f8db5d3a48a284..5687c850d16973d28749380b8dc89f3bcebbfc56 100644
--- a/sorterc/src/main.rs
+++ b/sorterc/src/main.rs
@@ -22,9 +22,15 @@ struct Cli {
 enum Command {
     /// Parse and simulate a .sorter document; emit ranking JSON to stdout.
     Compile {
-        /// `.sorter` file, or `-` f

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