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Where people and agents ship software together. The open-source git platform for the whole job: issues, agents, checks and deploys to the edge.

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g1t/crates/runner/src/learned.rs

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Agents get guardrails, run credentials, an audit log, a context hub, repository instructions and mentions; security upkeep; snake_case API1//! What the agent learned, asked for at the end of every run that changes
2//! code and reported to g1t as memory candidates.
3//!
4//! The question rides on the prompt rather than costing another model call:
5//! the agent ends its closing summary with a `<g1t-learned>` block of JSON,
6//! which is taken out of the summary (so the pull request reads as before)
7//! and sent with the run's own token. g1t keeps a candidate once a second,
8//! independent source says the same, or a person keeps it.
9
10use std::time::Duration;
11
12use serde_json::{Value, json};
13
14const OPEN: &str = "<g1t-learned>";
15const CLOSE: &str = "</g1t-learned>";
16/// The most items taken from one run.
17const MAX_ITEMS: usize = 8;
18const MAX_TEXT_CHARS: usize = 300;
19const MAX_EVIDENCE_CHARS: usize = 300;
20
21/// What the agent is asked, after its task.
22pub const ASK: &str = "When you are done, end your final message with what you learned here that the next agent would need and could not see at a glance: how to build or test, a convention, a decision and why, a trap. At most five short items, only ones you are sure of, never a secret, key or token. Write them as a JSON array inside <g1t-learned></g1t-learned> tags, each {\"kind\": \"fact\" | \"convention\" | \"decision\" | \"gotcha\", \"scope\": \"project\" | \"workspace\", \"text\": \"one sentence\", \"evidence\": \"what showed you, such as a command's output or a file\"}. scope workspace only for what holds in every project of the workspace. Write <g1t-learned>[]</g1t-learned> if there is nothing. The block is taken out of your summary.";
23
24/// The prompt with the question added.
25pub fn ask(prompt: &str) -> String {
26 format!("{prompt}\n\n{ASK}")
27}
28
29fn clip(text: &str, max: usize) -> String {
30 let text = text.split_whitespace().collect::<Vec<_>>().join(" ");
31 if text.chars().count() <= max {
32 text
33 } else {
34 text.chars().take(max).collect()
35 }
36}
37
38/// The summary without its `<g1t-learned>` block, and the items in it.
39/// A block that is missing or not JSON yields no items and leaves the
40/// summary as it was, less the block.
41pub fn split(summary: &str) -> (String, Vec<Value>) {
42 let Some(start) = summary.rfind(OPEN) else {
43 return (summary.trim().to_owned(), Vec::new());
44 };
45 let body_start = start + OPEN.len();
46 let end = summary[body_start..].find(CLOSE).map(|at| body_start + at);
47 let body = &summary[body_start..end.unwrap_or(summary.len())];
48 let rest = end.map_or("", |end| &summary[end + CLOSE.len()..]);
49 let clean = format!("{}{}", summary[..start].trim_end(), rest.trim_end()).trim().to_owned();
50 let body = body.trim().trim_start_matches("```json").trim_start_matches("```").trim_end_matches("```").trim();
51 let items = serde_json::from_str::<Vec<Value>>(body)
52 .unwrap_or_default()
53 .into_iter()
54 .filter_map(|item| {
55 let text = clip(item["text"].as_str()?, MAX_TEXT_CHARS);
56 if text.is_empty() {
57 return None;
58 }
59 let kind = item["kind"].as_str().filter(|kind| ["fact", "convention", "decision", "gotcha"].contains(kind));
60 let scope = item["scope"].as_str().filter(|scope| ["project", "workspace"].contains(scope));
61 Some(json!({
62 "kind": kind.unwrap_or("fact"),
63 "scope": scope.unwrap_or("project"),
64 "text": text,
65 "evidence": item["evidence"].as_str().map(|evidence| clip(evidence, MAX_EVIDENCE_CHARS)),
66 }))
67 })
68 .take(MAX_ITEMS)
69 .collect();
70 (clean, items)
71}
72
73/// Sends what was learned with the run's token. Never fails the run.
74pub fn report(items: &[Value]) {
75 if items.is_empty() {
76 return;
77 }
78 let (Ok(run), Ok(token)) = (std::env::var("AGENT_RUN"), std::env::var("AGENT_RUN_TOKEN")) else {
79 return;
80 };
81 let api = std::env::var("G1T_API").unwrap_or_else(|_| "https://api.g1t.sh".to_owned());
82 let sent = ureq::post(&format!("{}/agent-runs/{run}/learned", api.trim_end_matches('/')))
83 .timeout(Duration::from_secs(10))
84 .send_json(json!({ "token": token, "items": items }));
85 if let Err(error) = sent {
86 eprintln!("g1t-runner: could not report what the agent learned: {error}");
87 }
88}
89
90/// The summary with its block taken out, after reporting what it held.
91pub fn finish(summary: String) -> String {
92 let (clean, items) = split(&summary);
93 report(&items);
94 clean
95}
96
97#[cfg(test)]
98mod tests {
99 use super::*;
100
101 #[test]
102 fn the_block_is_taken_out_and_read() {
103 let summary = "Fixed the date tests.\n\n<g1t-learned>\n[{\"kind\": \"gotcha\", \"scope\": \"project\", \"text\": \"The date tests need TZ=UTC.\", \"evidence\": \"npm test failed in CI time zone\"}, {\"kind\": \"nonsense\", \"text\": \"We use pnpm.\", \"scope\": \"workspace\"}, {\"kind\": \"fact\"}]\n</g1t-learned>";
104 let (clean, items) = split(summary);
105 assert_eq!(clean, "Fixed the date tests.");
106 assert_eq!(items.len(), 2);
107 assert_eq!(items[0]["kind"], "gotcha");
108 assert_eq!(items[0]["evidence"], "npm test failed in CI time zone");
109 assert_eq!(items[1]["kind"], "fact");
110 assert_eq!(items[1]["scope"], "workspace");
111 }
112
113 #[test]
114 fn a_missing_or_broken_block_teaches_nothing() {
115 assert_eq!(split("Done."), ("Done.".to_owned(), Vec::new()));
116 let (clean, items) = split("Done.\n<g1t-learned>not json</g1t-learned>");
117 assert_eq!(clean, "Done.");
118 assert!(items.is_empty());
119 let (clean, items) = split("Done.\n<g1t-learned>\n```json\n[]\n```");
120 assert_eq!(clean, "Done.");
121 assert!(items.is_empty());
122 }
123
124 #[test]
125 fn the_question_follows_the_task() {
126 assert!(ask("Fix it.").starts_with("Fix it.\n\n"));
127 assert!(ASK.contains("never a secret"));
128 }
129}