lean_ctx/core/
context_proof.rs

1use chrono::TimeZone;
2use serde::Serialize;
3use std::path::{Path, PathBuf};
4use std::sync::atomic::{AtomicU64, Ordering};
5
6static PROOFS_COLLECTED: AtomicU64 = AtomicU64::new(0);
7static PROOFS_WRITTEN: AtomicU64 = AtomicU64::new(0);
8static LAST_WRITTEN_UNIX_MS: AtomicU64 = AtomicU64::new(0);
9
10#[derive(Debug, Clone, Serialize)]
11pub struct ProofStatsSnapshot {
12    pub collected: u64,
13    pub written: u64,
14    pub last_written_at: Option<String>,
15}
16
17pub(crate) fn proof_stats_snapshot() -> ProofStatsSnapshot {
18    let collected = PROOFS_COLLECTED.load(Ordering::Relaxed);
19    let written = PROOFS_WRITTEN.load(Ordering::Relaxed);
20    let last_ms = LAST_WRITTEN_UNIX_MS.load(Ordering::Relaxed);
21    let last_written_at = if last_ms == 0 {
22        None
23    } else {
24        chrono::Utc
25            .timestamp_millis_opt(last_ms as i64)
26            .single()
27            .map(|t| t.to_rfc3339())
28    };
29    ProofStatsSnapshot {
30        collected,
31        written,
32        last_written_at,
33    }
34}
35
36#[derive(Debug, Clone, Serialize)]
37pub struct ContextProofV1 {
38    pub schema_version: u32,
39    pub created_at: String,
40    pub lean_ctx_version: String,
41    pub session_id: Option<String>,
42    pub project: ProjectIdentity,
43    pub role: RoleIdentity,
44    pub profile: ProfileIdentity,
45    /// Kept for the proof's wire shape. Per-layer metrics are not collected,
46    /// so this is `runs: 0` unless a legacy `pipeline_stats.json` exists.
47    pub pipeline: crate::core::pipeline::PipelineStats,
48    pub verification: crate::core::output_verification::VerificationSnapshot,
49    pub ledger: LedgerSummary,
50    pub evidence: Vec<EvidenceReceipt>,
51}
52
53#[derive(Debug, Clone, Serialize)]
54pub struct ProjectIdentity {
55    pub project_root_hash: Option<String>,
56    pub project_identity_hash: Option<String>,
57}
58
59#[derive(Debug, Clone, Serialize)]
60pub struct RoleIdentity {
61    pub name: String,
62    /// BLAKE3 hex; the serialized name keeps its historical `_md5` suffix.
63    #[serde(rename = "policy_md5")]
64    pub policy_blake3: String,
65}
66
67#[derive(Debug, Clone, Serialize)]
68pub struct ProfileIdentity {
69    pub name: String,
70    /// BLAKE3 hex; the serialized name keeps its historical `_md5` suffix.
71    #[serde(rename = "policy_md5")]
72    pub policy_blake3: String,
73}
74
75#[derive(Debug, Clone, Serialize)]
76pub struct LedgerSummary {
77    pub window_size: usize,
78    pub entries: usize,
79    pub total_tokens_sent: usize,
80    pub total_tokens_saved: usize,
81    pub compression_ratio: f64,
82    pub top_files_by_sent_tokens: Vec<LedgerFileSummary>,
83}
84
85#[derive(Debug, Clone, Serialize)]
86pub struct LedgerFileSummary {
87    pub path: String,
88    pub mode: String,
89    pub sent_tokens: usize,
90    pub original_tokens: usize,
91}
92
93#[derive(Debug, Clone, Serialize)]
94pub struct EvidenceReceipt {
95    pub tool: Option<String>,
96    pub input_md5: Option<String>,
97    pub output_md5: Option<String>,
98    pub agent_id: Option<String>,
99    pub client_name: Option<String>,
100    pub timestamp: String,
101}
102
103#[derive(Debug, Clone, Copy, Default)]
104pub struct ProofOptions {
105    pub max_evidence: usize,
106    pub max_ledger_files: usize,
107}
108
109#[derive(Debug, Clone, Default)]
110pub struct ProofSources {
111    pub project_root: Option<String>,
112    pub session: Option<crate::core::session::SessionState>,
113    pub pipeline: Option<crate::core::pipeline::PipelineStats>,
114    pub ledger: Option<crate::core::context_ledger::ContextLedger>,
115}
116
117pub fn collect_v1(sources: ProofSources, opts: ProofOptions) -> ContextProofV1 {
118    PROOFS_COLLECTED.fetch_add(1, Ordering::Relaxed);
119    let created_at = chrono::Utc::now().to_rfc3339();
120
121    let role_name = crate::core::roles::active_role_name();
122    let role = crate::core::roles::active_role();
123
124    let profile_name = crate::core::profiles::active_profile_name();
125    let profile = crate::core::profiles::active_profile();
126
127    let role_policy_blake3 =
128        crate::core::hasher::hash_str(&serde_json::to_string(&role).unwrap_or_default());
129    let profile_policy_blake3 =
130        crate::core::hasher::hash_str(&serde_json::to_string(&profile).unwrap_or_default());
131
132    let project_root = sources.project_root.clone().or_else(|| {
133        sources
134            .session
135            .as_ref()
136            .and_then(|s| s.project_root.clone())
137    });
138
139    let (project_root_hash, project_identity_hash) = if let Some(ref root) = project_root {
140        let root_hash = crate::core::project_hash::hash_project_root(root);
141        let identity = crate::core::project_hash::project_identity(root);
142        let identity_hash = identity.as_deref().map(crate::core::hasher::hash_str);
143        (Some(root_hash), identity_hash)
144    } else {
145        (None, None)
146    };
147
148    let verification = crate::core::output_verification::stats_snapshot();
149
150    let pipeline = sources
151        .pipeline
152        .unwrap_or_else(crate::core::pipeline::PipelineStats::load);
153
154    let ledger = sources
155        .ledger
156        .unwrap_or_else(crate::core::context_ledger::ContextLedger::load);
157
158    let top_files = ledger
159        .files_by_token_cost()
160        .into_iter()
161        .take(opts.max_ledger_files.max(1))
162        .filter_map(|(path, _)| ledger.entries.iter().find(|e| e.path == path).cloned())
163        .map(|e| LedgerFileSummary {
164            path: e.path,
165            mode: e.mode,
166            sent_tokens: e.sent_tokens,
167            original_tokens: e.original_tokens,
168        })
169        .collect::<Vec<_>>();
170
171    let ledger_summary = LedgerSummary {
172        window_size: ledger.window_size,
173        entries: ledger.entries.len(),
174        total_tokens_sent: ledger.total_tokens_sent,
175        total_tokens_saved: ledger.total_tokens_saved,
176        compression_ratio: ledger.compression_ratio(),
177        top_files_by_sent_tokens: top_files,
178    };
179
180    let session = sources.session.or_else(|| {
181        project_root
182            .as_deref()
183            .and_then(crate::core::session::SessionState::load_latest_for_project_root)
184            .or_else(crate::core::session::SessionState::load_latest)
185    });
186
187    let (session_id, evidence) = if let Some(s) = session {
188        let mut receipts = s
189            .evidence
190            .into_iter()
191            .filter(|e| matches!(e.kind, crate::core::session::EvidenceKind::ToolCall))
192            .rev()
193            .take(opts.max_evidence.max(1))
194            .map(|e| EvidenceReceipt {
195                tool: e.tool,
196                input_md5: e.input_md5,
197                output_md5: e.output_md5,
198                agent_id: e.agent_id,
199                client_name: e.client_name,
200                timestamp: e.timestamp.to_rfc3339(),
201            })
202            .collect::<Vec<_>>();
203        receipts.reverse();
204        (Some(s.id), receipts)
205    } else {
206        (None, Vec::new())
207    };
208
209    ContextProofV1 {
210        schema_version: crate::core::contracts::CONTEXT_PROOF_V1_SCHEMA_VERSION,
211        created_at,
212        lean_ctx_version: env!("CARGO_PKG_VERSION").to_string(),
213        session_id,
214        project: ProjectIdentity {
215            project_root_hash,
216            project_identity_hash,
217        },
218        role: RoleIdentity {
219            name: role_name,
220            policy_blake3: role_policy_blake3,
221        },
222        profile: ProfileIdentity {
223            name: profile_name,
224            policy_blake3: profile_policy_blake3,
225        },
226        pipeline,
227        verification,
228        ledger: ledger_summary,
229        evidence,
230    }
231}
232
233pub fn write_project_proof(
234    project_root: &Path,
235    proof: &ContextProofV1,
236    filename: Option<&str>,
237) -> Result<PathBuf, String> {
238    let proofs_dir = crate::core::pathutil::safe_project_data_dir(project_root)?.join("proofs");
239    std::fs::create_dir_all(&proofs_dir).map_err(|e| e.to_string())?;
240
241    let ts = chrono::Utc::now().format("%Y-%m-%d_%H%M%S");
242    let name = match filename {
243        None => format!("context-proof-v1_{ts}.json"),
244        // `filename` comes from the ctx_proof caller. Only a bare file name may
245        // be joined onto proofs/: `Path::join` drops the base for an absolute
246        // path, and `..` would walk out of it.
247        Some(f) => {
248            let mut components = Path::new(f).components();
249            match (components.next(), components.next()) {
250                (Some(std::path::Component::Normal(_)), None) => f.to_string(),
251                _ => return Err(format!("filename must be a plain file name: {f}")),
252            }
253        }
254    };
255    let path = proofs_dir.join(name);
256
257    let json = serde_json::to_string_pretty(proof).map_err(|e| e.to_string())?;
258    // Proof artifacts may be attached to CI logs; always redact (even for admin).
259    let json = crate::core::redaction::redact_text(&json);
260    crate::config_io::write_atomic(&path, &json)?;
261
262    PROOFS_WRITTEN.fetch_add(1, Ordering::Relaxed);
263    let ms = std::time::SystemTime::now()
264        .duration_since(std::time::SystemTime::UNIX_EPOCH)
265        .map_or(0, |d| d.as_millis() as u64);
266    LAST_WRITTEN_UNIX_MS.store(ms, Ordering::Relaxed);
267
268    Ok(path)
269}
270
271#[cfg(test)]
272mod tests {
273    use super::*;
274
275    #[test]
276    fn proof_has_required_fields() {
277        let proof = collect_v1(
278            ProofSources {
279                project_root: Some(".".to_string()),
280                ..Default::default()
281            },
282            ProofOptions {
283                max_evidence: 5,
284                max_ledger_files: 3,
285            },
286        );
287        let v = serde_json::to_value(&proof).unwrap();
288        assert_eq!(v["schema_version"], 1);
289        assert!(v["created_at"].as_str().unwrap_or_default().contains('T'));
290        assert!(v["lean_ctx_version"].as_str().unwrap_or_default().len() >= 3);
291        // The BLAKE3 policy hashes keep their historical wire name.
292        assert!(v["role"]["policy_md5"].is_string(), "{v}");
293        assert!(v["profile"]["policy_md5"].is_string(), "{v}");
294    }
295
296    #[test]
297    fn write_project_proof_creates_file() {
298        let dir = tempfile::tempdir().unwrap();
299        let proof = collect_v1(
300            ProofSources {
301                project_root: Some(dir.path().to_string_lossy().to_string()),
302                ..Default::default()
303            },
304            ProofOptions {
305                max_evidence: 3,
306                max_ledger_files: 2,
307            },
308        );
309        let path = write_project_proof(dir.path(), &proof, None).unwrap();
310        assert!(path.exists());
311        let content = std::fs::read_to_string(path).unwrap();
312        assert!(content.contains("\"schema_version\": 1"));
313    }
314
315    #[test]
316    fn write_project_proof_rejects_filenames_outside_proofs_dir() {
317        let dir = tempfile::tempdir().unwrap();
318        let project = dir.path().join("proj");
319        std::fs::create_dir_all(&project).unwrap();
320        let proof = collect_v1(
321            ProofSources {
322                project_root: Some(project.to_string_lossy().to_string()),
323                ..Default::default()
324            },
325            ProofOptions {
326                max_evidence: 1,
327                max_ledger_files: 1,
328            },
329        );
330        let outside = dir.path().join("outside.json");
331        let outside_abs = outside.to_string_lossy().to_string();
332        for name in [
333            "../../../outside.json",
334            outside_abs.as_str(),
335            "sub/dir.json",
336            "..",
337            ".",
338            "",
339        ] {
340            assert!(
341                write_project_proof(&project, &proof, Some(name)).is_err(),
342                "filename {name:?} must be rejected"
343            );
344        }
345        assert!(!outside.exists(), "nothing may be written outside proofs/");
346
347        let path = write_project_proof(&project, &proof, Some("named.json")).unwrap();
348        assert_eq!(path.file_name().unwrap(), "named.json");
349        assert!(path.parent().unwrap().ends_with("proofs"));
350    }
351}
lean_ctx/core/context_proof.rs

lean_ctx/core/
context_proof.rs
