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lean_ctx/core/
config.rs

1use serde::{Deserialize, Serialize};
2use std::path::PathBuf;
3use std::sync::Mutex;
4use std::time::SystemTime;
5
6#[derive(Debug, Clone, Default, Serialize, Deserialize, PartialEq)]
7#[serde(rename_all = "lowercase")]
8pub enum TeeMode {
9    Never,
10    #[default]
11    Failures,
12    Always,
13}
14
15#[derive(Debug, Clone, Default, Serialize, Deserialize, PartialEq)]
16#[serde(rename_all = "lowercase")]
17pub enum TerseAgent {
18    #[default]
19    Off,
20    Lite,
21    Full,
22    Ultra,
23}
24
25impl TerseAgent {
26    pub fn from_env() -> Self {
27        match std::env::var("NEBU_CTX_TERSE_AGENT")
28            .unwrap_or_default()
29            .to_lowercase()
30            .as_str()
31        {
32            "lite" => Self::Lite,
33            "full" => Self::Full,
34            "ultra" => Self::Ultra,
35            "off" | "0" | "false" => Self::Off,
36            _ => Self::Off,
37        }
38    }
39
40    pub fn effective(config_val: &TerseAgent) -> Self {
41        match std::env::var("NEBU_CTX_TERSE_AGENT") {
42            Ok(val) if !val.is_empty() => match val.to_lowercase().as_str() {
43                "lite" => Self::Lite,
44                "full" => Self::Full,
45                "ultra" => Self::Ultra,
46                _ => Self::Off,
47            },
48            _ => config_val.clone(),
49        }
50    }
51
52    pub fn is_active(&self) -> bool {
53        !matches!(self, Self::Off)
54    }
55}
56
57#[derive(Debug, Clone, Default, Serialize, Deserialize, PartialEq)]
58#[serde(rename_all = "lowercase")]
59pub enum OutputDensity {
60    #[default]
61    Normal,
62    Terse,
63    Ultra,
64}
65
66impl OutputDensity {
67    pub fn from_env() -> Self {
68        match std::env::var("NEBU_CTX_OUTPUT_DENSITY")
69            .unwrap_or_default()
70            .to_lowercase()
71            .as_str()
72        {
73            "terse" => Self::Terse,
74            "ultra" => Self::Ultra,
75            _ => Self::Normal,
76        }
77    }
78
79    pub fn effective(config_val: &OutputDensity) -> Self {
80        let env_val = Self::from_env();
81        if env_val != Self::Normal {
82            return env_val;
83        }
84        config_val.clone()
85    }
86}
87
88#[derive(Debug, Clone, Serialize, Deserialize)]
89#[serde(default)]
90pub struct Config {
91    pub ultra_compact: bool,
92    #[serde(default, deserialize_with = "deserialize_tee_mode")]
93    pub tee_mode: TeeMode,
94    #[serde(default)]
95    pub output_density: OutputDensity,
96    pub checkpoint_interval: u32,
97    pub excluded_commands: Vec<String>,
98    pub passthrough_urls: Vec<String>,
99    pub custom_aliases: Vec<AliasEntry>,
100    /// Commands taking longer than this threshold (ms) are recorded in the slow log.
101    /// Set to 0 to disable slow logging.
102    pub slow_command_threshold_ms: u64,
103    #[serde(default = "default_theme")]
104    pub theme: String,
105    #[serde(default)]
106    pub server: ServerConfig,
107    #[serde(default)]
108    pub autonomy: AutonomyConfig,
109    #[serde(default = "default_buddy_enabled")]
110    pub buddy_enabled: bool,
111    #[serde(default)]
112    pub redirect_exclude: Vec<String>,
113    /// Tools to exclude from the MCP tool list returned by list_tools.
114    /// Accepts exact tool names (e.g. ["ctx_graph", "ctx_agent"]).
115    /// Empty by default — all tools listed, no behaviour change.
116    #[serde(default)]
117    pub disabled_tools: Vec<String>,
118    #[serde(default)]
119    pub loop_detection: LoopDetectionConfig,
120    /// Controls where nebu-ctx installs agent rule files.
121    /// Values: "both" (default), "global" (home-dir only), "project" (repo-local only).
122    /// Override via NEBU_CTX_RULES_SCOPE env var.
123    #[serde(default)]
124    pub rules_scope: Option<String>,
125    /// Extra glob patterns to ignore in graph/overview/preload (repo-local).
126    /// Example: ["externals/**", "target/**", "temp/**"]
127    #[serde(default)]
128    pub extra_ignore_patterns: Vec<String>,
129    /// Controls agent output verbosity via instructions injection.
130    /// Values: "off" (default), "lite", "full", "ultra".
131    /// Override via NEBU_CTX_TERSE_AGENT env var.
132    #[serde(default)]
133    pub terse_agent: TerseAgent,
134    /// Archive configuration for zero-loss compression.
135    #[serde(default)]
136    pub archive: ArchiveConfig,
137}
138
139#[derive(Debug, Clone, Serialize, Deserialize)]
140#[serde(default)]
141pub struct ArchiveConfig {
142    pub enabled: bool,
143    pub threshold_chars: usize,
144    pub max_age_hours: u64,
145    pub max_disk_mb: u64,
146}
147
148impl Default for ArchiveConfig {
149    fn default() -> Self {
150        Self {
151            enabled: true,
152            threshold_chars: 4096,
153            max_age_hours: 48,
154            max_disk_mb: 500,
155        }
156    }
157}
158
159fn default_buddy_enabled() -> bool {
160    true
161}
162
163fn deserialize_tee_mode<'de, D>(deserializer: D) -> Result<TeeMode, D::Error>
164where
165    D: serde::Deserializer<'de>,
166{
167    use serde::de::Error;
168    let v = serde_json::Value::deserialize(deserializer)?;
169    match &v {
170        serde_json::Value::Bool(true) => Ok(TeeMode::Failures),
171        serde_json::Value::Bool(false) => Ok(TeeMode::Never),
172        serde_json::Value::String(s) => match s.as_str() {
173            "never" => Ok(TeeMode::Never),
174            "failures" => Ok(TeeMode::Failures),
175            "always" => Ok(TeeMode::Always),
176            other => Err(D::Error::custom(format!("unknown tee_mode: {other}"))),
177        },
178        _ => Err(D::Error::custom("tee_mode must be string or bool")),
179    }
180}
181
182fn default_theme() -> String {
183    "default".to_string()
184}
185
186#[derive(Debug, Clone, Serialize, Deserialize)]
187#[serde(default)]
188pub struct AutonomyConfig {
189    pub enabled: bool,
190    pub auto_preload: bool,
191    pub auto_dedup: bool,
192    pub auto_related: bool,
193    pub auto_consolidate: bool,
194    pub silent_preload: bool,
195    pub dedup_threshold: usize,
196    pub consolidate_every_calls: u32,
197    pub consolidate_cooldown_secs: u64,
198}
199
200impl Default for AutonomyConfig {
201    fn default() -> Self {
202        Self {
203            enabled: true,
204            auto_preload: true,
205            auto_dedup: true,
206            auto_related: true,
207            auto_consolidate: true,
208            silent_preload: true,
209            dedup_threshold: 8,
210            consolidate_every_calls: 25,
211            consolidate_cooldown_secs: 120,
212        }
213    }
214}
215
216impl AutonomyConfig {
217    pub fn from_env() -> Self {
218        let mut cfg = Self::default();
219        if let Ok(v) = std::env::var("NEBU_CTX_AUTONOMY") {
220            if v == "false" || v == "0" {
221                cfg.enabled = false;
222            }
223        }
224        if let Ok(v) = std::env::var("NEBU_CTX_AUTO_PRELOAD") {
225            cfg.auto_preload = v != "false" && v != "0";
226        }
227        if let Ok(v) = std::env::var("NEBU_CTX_AUTO_DEDUP") {
228            cfg.auto_dedup = v != "false" && v != "0";
229        }
230        if let Ok(v) = std::env::var("NEBU_CTX_AUTO_RELATED") {
231            cfg.auto_related = v != "false" && v != "0";
232        }
233        if let Ok(v) = std::env::var("NEBU_CTX_AUTO_CONSOLIDATE") {
234            cfg.auto_consolidate = v != "false" && v != "0";
235        }
236        if let Ok(v) = std::env::var("NEBU_CTX_SILENT_PRELOAD") {
237            cfg.silent_preload = v != "false" && v != "0";
238        }
239        if let Ok(v) = std::env::var("NEBU_CTX_DEDUP_THRESHOLD") {
240            if let Ok(n) = v.parse() {
241                cfg.dedup_threshold = n;
242            }
243        }
244        if let Ok(v) = std::env::var("NEBU_CTX_CONSOLIDATE_EVERY_CALLS") {
245            if let Ok(n) = v.parse() {
246                cfg.consolidate_every_calls = n;
247            }
248        }
249        if let Ok(v) = std::env::var("NEBU_CTX_CONSOLIDATE_COOLDOWN_SECS") {
250            if let Ok(n) = v.parse() {
251                cfg.consolidate_cooldown_secs = n;
252            }
253        }
254        cfg
255    }
256
257    pub fn load() -> Self {
258        let file_cfg = Config::load().autonomy;
259        let mut cfg = file_cfg;
260        if let Ok(v) = std::env::var("NEBU_CTX_AUTONOMY") {
261            if v == "false" || v == "0" {
262                cfg.enabled = false;
263            }
264        }
265        if let Ok(v) = std::env::var("NEBU_CTX_AUTO_PRELOAD") {
266            cfg.auto_preload = v != "false" && v != "0";
267        }
268        if let Ok(v) = std::env::var("NEBU_CTX_AUTO_DEDUP") {
269            cfg.auto_dedup = v != "false" && v != "0";
270        }
271        if let Ok(v) = std::env::var("NEBU_CTX_AUTO_RELATED") {
272            cfg.auto_related = v != "false" && v != "0";
273        }
274        if let Ok(v) = std::env::var("NEBU_CTX_SILENT_PRELOAD") {
275            cfg.silent_preload = v != "false" && v != "0";
276        }
277        if let Ok(v) = std::env::var("NEBU_CTX_DEDUP_THRESHOLD") {
278            if let Ok(n) = v.parse() {
279                cfg.dedup_threshold = n;
280            }
281        }
282        cfg
283    }
284}
285
286#[derive(Debug, Clone, Serialize, Deserialize, Default)]
287#[serde(default)]
288pub struct ServerConfig {
289    pub contribute_enabled: bool,
290    pub last_contribute: Option<String>,
291    pub last_sync: Option<String>,
292    pub last_gain_sync: Option<String>,
293    pub last_model_pull: Option<String>,
294}
295
296#[derive(Debug, Clone, Serialize, Deserialize)]
297pub struct AliasEntry {
298    pub command: String,
299    pub alias: String,
300}
301
302#[derive(Debug, Clone, Serialize, Deserialize)]
303#[serde(default)]
304pub struct LoopDetectionConfig {
305    pub normal_threshold: u32,
306    pub reduced_threshold: u32,
307    pub blocked_threshold: u32,
308    pub window_secs: u64,
309    pub search_group_limit: u32,
310}
311
312impl Default for LoopDetectionConfig {
313    fn default() -> Self {
314        Self {
315            normal_threshold: 2,
316            reduced_threshold: 4,
317            blocked_threshold: 6,
318            window_secs: 300,
319            search_group_limit: 10,
320        }
321    }
322}
323
324impl Default for Config {
325    fn default() -> Self {
326        Self {
327            ultra_compact: false,
328            tee_mode: TeeMode::default(),
329            output_density: OutputDensity::default(),
330            checkpoint_interval: 15,
331            excluded_commands: Vec::new(),
332            passthrough_urls: Vec::new(),
333            custom_aliases: Vec::new(),
334            slow_command_threshold_ms: 5000,
335            theme: default_theme(),
336            server: ServerConfig::default(),
337            autonomy: AutonomyConfig::default(),
338            buddy_enabled: default_buddy_enabled(),
339            redirect_exclude: Vec::new(),
340            disabled_tools: Vec::new(),
341            loop_detection: LoopDetectionConfig::default(),
342            rules_scope: None,
343            extra_ignore_patterns: Vec::new(),
344            terse_agent: TerseAgent::default(),
345            archive: ArchiveConfig::default(),
346        }
347    }
348}
349
350#[derive(Debug, Clone, Copy, PartialEq, Eq)]
351pub enum RulesScope {
352    Both,
353    Global,
354    Project,
355}
356
357impl Config {
358    pub fn rules_scope_effective(&self) -> RulesScope {
359        let raw = std::env::var("NEBU_CTX_RULES_SCOPE")
360            .ok()
361            .or_else(|| self.rules_scope.clone())
362            .unwrap_or_default();
363        match raw.trim().to_lowercase().as_str() {
364            "global" => RulesScope::Global,
365            "project" => RulesScope::Project,
366            _ => RulesScope::Both,
367        }
368    }
369
370    fn parse_disabled_tools_env(val: &str) -> Vec<String> {
371        val.split(',')
372            .map(|s| s.trim().to_string())
373            .filter(|s| !s.is_empty())
374            .collect()
375    }
376
377    pub fn disabled_tools_effective(&self) -> Vec<String> {
378        if let Ok(val) = std::env::var("NEBU_CTX_DISABLED_TOOLS") {
379            Self::parse_disabled_tools_env(&val)
380        } else {
381            self.disabled_tools.clone()
382        }
383    }
384}
385
386#[cfg(test)]
387mod disabled_tools_tests {
388    use super::*;
389
390    #[test]
391    fn config_field_default_is_empty() {
392        let cfg = Config::default();
393        assert!(cfg.disabled_tools.is_empty());
394    }
395
396    #[test]
397    fn effective_returns_config_field_when_no_env_var() {
398        // Only meaningful when NEBU_CTX_DISABLED_TOOLS is unset; skip otherwise.
399        if std::env::var("NEBU_CTX_DISABLED_TOOLS").is_ok() {
400            return;
401        }
402        let cfg = Config {
403            disabled_tools: vec!["ctx_graph".to_string(), "ctx_agent".to_string()],
404            ..Default::default()
405        };
406        assert_eq!(
407            cfg.disabled_tools_effective(),
408            vec!["ctx_graph", "ctx_agent"]
409        );
410    }
411
412    #[test]
413    fn parse_env_basic() {
414        let result = Config::parse_disabled_tools_env("ctx_graph,ctx_agent");
415        assert_eq!(result, vec!["ctx_graph", "ctx_agent"]);
416    }
417
418    #[test]
419    fn parse_env_trims_whitespace_and_skips_empty() {
420        let result = Config::parse_disabled_tools_env(" ctx_graph , , ctx_agent ");
421        assert_eq!(result, vec!["ctx_graph", "ctx_agent"]);
422    }
423
424    #[test]
425    fn parse_env_single_entry() {
426        let result = Config::parse_disabled_tools_env("ctx_graph");
427        assert_eq!(result, vec!["ctx_graph"]);
428    }
429
430    #[test]
431    fn parse_env_empty_string_returns_empty() {
432        let result = Config::parse_disabled_tools_env("");
433        assert!(result.is_empty());
434    }
435
436    #[test]
437    fn disabled_tools_deserialization_defaults_to_empty() {
438        let cfg: Config = toml::from_str("").unwrap();
439        assert!(cfg.disabled_tools.is_empty());
440    }
441
442    #[test]
443    fn disabled_tools_deserialization_from_toml() {
444        let cfg: Config = toml::from_str(r#"disabled_tools = ["ctx_graph", "ctx_agent"]"#).unwrap();
445        assert_eq!(cfg.disabled_tools, vec!["ctx_graph", "ctx_agent"]);
446    }
447}
448
449#[cfg(test)]
450mod rules_scope_tests {
451    use super::*;
452
453    #[test]
454    fn default_is_both() {
455        let cfg = Config::default();
456        assert_eq!(cfg.rules_scope_effective(), RulesScope::Both);
457    }
458
459    #[test]
460    fn config_global() {
461        let cfg = Config {
462            rules_scope: Some("global".to_string()),
463            ..Default::default()
464        };
465        assert_eq!(cfg.rules_scope_effective(), RulesScope::Global);
466    }
467
468    #[test]
469    fn config_project() {
470        let cfg = Config {
471            rules_scope: Some("project".to_string()),
472            ..Default::default()
473        };
474        assert_eq!(cfg.rules_scope_effective(), RulesScope::Project);
475    }
476
477    #[test]
478    fn unknown_value_falls_back_to_both() {
479        let cfg = Config {
480            rules_scope: Some("nonsense".to_string()),
481            ..Default::default()
482        };
483        assert_eq!(cfg.rules_scope_effective(), RulesScope::Both);
484    }
485
486    #[test]
487    fn deserialization_none_by_default() {
488        let cfg: Config = toml::from_str("").unwrap();
489        assert!(cfg.rules_scope.is_none());
490        assert_eq!(cfg.rules_scope_effective(), RulesScope::Both);
491    }
492
493    #[test]
494    fn deserialization_from_toml() {
495        let cfg: Config = toml::from_str(r#"rules_scope = "project""#).unwrap();
496        assert_eq!(cfg.rules_scope.as_deref(), Some("project"));
497        assert_eq!(cfg.rules_scope_effective(), RulesScope::Project);
498    }
499}
500
501#[cfg(test)]
502mod loop_detection_config_tests {
503    use super::*;
504
505    #[test]
506    fn defaults_are_reasonable() {
507        let cfg = LoopDetectionConfig::default();
508        assert_eq!(cfg.normal_threshold, 2);
509        assert_eq!(cfg.reduced_threshold, 4);
510        assert_eq!(cfg.blocked_threshold, 6);
511        assert_eq!(cfg.window_secs, 300);
512        assert_eq!(cfg.search_group_limit, 10);
513    }
514
515    #[test]
516    fn deserialization_defaults_when_missing() {
517        let cfg: Config = toml::from_str("").unwrap();
518        assert_eq!(cfg.loop_detection.blocked_threshold, 6);
519        assert_eq!(cfg.loop_detection.search_group_limit, 10);
520    }
521
522    #[test]
523    fn deserialization_from_toml() {
524        let cfg: Config = toml::from_str(
525            r#"
526            [loop_detection]
527            normal_threshold = 1
528            reduced_threshold = 3
529            blocked_threshold = 5
530            window_secs = 120
531            search_group_limit = 8
532            "#,
533        )
534        .unwrap();
535        assert_eq!(cfg.loop_detection.normal_threshold, 1);
536        assert_eq!(cfg.loop_detection.reduced_threshold, 3);
537        assert_eq!(cfg.loop_detection.blocked_threshold, 5);
538        assert_eq!(cfg.loop_detection.window_secs, 120);
539        assert_eq!(cfg.loop_detection.search_group_limit, 8);
540    }
541
542    #[test]
543    fn partial_override_keeps_defaults() {
544        let cfg: Config = toml::from_str(
545            r#"
546            [loop_detection]
547            blocked_threshold = 10
548            "#,
549        )
550        .unwrap();
551        assert_eq!(cfg.loop_detection.blocked_threshold, 10);
552        assert_eq!(cfg.loop_detection.normal_threshold, 2);
553        assert_eq!(cfg.loop_detection.search_group_limit, 10);
554    }
555}
556
557impl Config {
558    pub fn path() -> Option<PathBuf> {
559        crate::core::data_dir::nebu_ctx_data_dir()
560            .ok()
561            .map(|d| d.join("config.toml"))
562    }
563
564    pub fn local_path(project_root: &str) -> PathBuf {
565        PathBuf::from(project_root).join(".nebu-ctx.toml")
566    }
567
568    fn find_project_root() -> Option<String> {
569        let cwd = std::env::current_dir().ok();
570
571        if let Some(root) =
572            crate::core::session::SessionState::load_latest().and_then(|s| s.project_root)
573        {
574            let root_path = std::path::Path::new(&root);
575            let cwd_is_under_root = cwd
576                .as_ref()
577                .map(|c| c.starts_with(root_path))
578                .unwrap_or(false);
579            let has_marker = root_path.join(".git").exists()
580                || root_path.join("Cargo.toml").exists()
581                || root_path.join("package.json").exists()
582                || root_path.join("go.mod").exists()
583                || root_path.join("pyproject.toml").exists()
584                || root_path.join(".nebu-ctx.toml").exists();
585
586            if cwd_is_under_root || has_marker {
587                return Some(root);
588            }
589        }
590
591        if let Some(ref cwd) = cwd {
592            let git_root = std::process::Command::new("git")
593                .args(["rev-parse", "--show-toplevel"])
594                .current_dir(cwd)
595                .stdout(std::process::Stdio::piped())
596                .stderr(std::process::Stdio::null())
597                .output()
598                .ok()
599                .and_then(|o| {
600                    if o.status.success() {
601                        String::from_utf8(o.stdout)
602                            .ok()
603                            .map(|s| s.trim().to_string())
604                    } else {
605                        None
606                    }
607                });
608            if let Some(root) = git_root {
609                return Some(root);
610            }
611            return Some(cwd.to_string_lossy().to_string());
612        }
613        None
614    }
615
616    pub fn load() -> Self {
617        static CACHE: Mutex<Option<(Config, SystemTime, Option<SystemTime>)>> = Mutex::new(None);
618
619        let path = match Self::path() {
620            Some(p) => p,
621            None => return Self::default(),
622        };
623
624        let local_path = Self::find_project_root().map(|r| Self::local_path(&r));
625
626        let mtime = std::fs::metadata(&path)
627            .and_then(|m| m.modified())
628            .unwrap_or(SystemTime::UNIX_EPOCH);
629
630        let local_mtime = local_path
631            .as_ref()
632            .and_then(|p| std::fs::metadata(p).and_then(|m| m.modified()).ok());
633
634        if let Ok(guard) = CACHE.lock() {
635            if let Some((ref cfg, ref cached_mtime, ref cached_local_mtime)) = *guard {
636                if *cached_mtime == mtime && *cached_local_mtime == local_mtime {
637                    return cfg.clone();
638                }
639            }
640        }
641
642        let mut cfg: Config = match std::fs::read_to_string(&path) {
643            Ok(content) => toml::from_str(&content).unwrap_or_default(),
644            Err(_) => Self::default(),
645        };
646
647        if let Some(ref lp) = local_path {
648            if let Ok(local_content) = std::fs::read_to_string(lp) {
649                cfg.merge_local(&local_content);
650            }
651        }
652
653        if let Ok(mut guard) = CACHE.lock() {
654            *guard = Some((cfg.clone(), mtime, local_mtime));
655        }
656
657        cfg
658    }
659
660    fn merge_local(&mut self, local_toml: &str) {
661        let local: Config = match toml::from_str(local_toml) {
662            Ok(c) => c,
663            Err(_) => return,
664        };
665        if local.ultra_compact {
666            self.ultra_compact = true;
667        }
668        if local.tee_mode != TeeMode::default() {
669            self.tee_mode = local.tee_mode;
670        }
671        if local.output_density != OutputDensity::default() {
672            self.output_density = local.output_density;
673        }
674        if local.checkpoint_interval != 15 {
675            self.checkpoint_interval = local.checkpoint_interval;
676        }
677        if !local.excluded_commands.is_empty() {
678            self.excluded_commands.extend(local.excluded_commands);
679        }
680        if !local.passthrough_urls.is_empty() {
681            self.passthrough_urls.extend(local.passthrough_urls);
682        }
683        if !local.custom_aliases.is_empty() {
684            self.custom_aliases.extend(local.custom_aliases);
685        }
686        if local.slow_command_threshold_ms != 5000 {
687            self.slow_command_threshold_ms = local.slow_command_threshold_ms;
688        }
689        if local.theme != "default" {
690            self.theme = local.theme;
691        }
692        if !local.buddy_enabled {
693            self.buddy_enabled = false;
694        }
695        if !local.redirect_exclude.is_empty() {
696            self.redirect_exclude.extend(local.redirect_exclude);
697        }
698        if !local.disabled_tools.is_empty() {
699            self.disabled_tools.extend(local.disabled_tools);
700        }
701        if !local.extra_ignore_patterns.is_empty() {
702            self.extra_ignore_patterns
703                .extend(local.extra_ignore_patterns);
704        }
705        if local.rules_scope.is_some() {
706            self.rules_scope = local.rules_scope;
707        }
708        if !local.autonomy.enabled {
709            self.autonomy.enabled = false;
710        }
711        if !local.autonomy.auto_preload {
712            self.autonomy.auto_preload = false;
713        }
714        if !local.autonomy.auto_dedup {
715            self.autonomy.auto_dedup = false;
716        }
717        if !local.autonomy.auto_related {
718            self.autonomy.auto_related = false;
719        }
720        if !local.autonomy.auto_consolidate {
721            self.autonomy.auto_consolidate = false;
722        }
723        if local.autonomy.silent_preload {
724            self.autonomy.silent_preload = true;
725        }
726        if !local.autonomy.silent_preload && self.autonomy.silent_preload {
727            self.autonomy.silent_preload = false;
728        }
729        if local.autonomy.dedup_threshold != AutonomyConfig::default().dedup_threshold {
730            self.autonomy.dedup_threshold = local.autonomy.dedup_threshold;
731        }
732        if local.autonomy.consolidate_every_calls
733            != AutonomyConfig::default().consolidate_every_calls
734        {
735            self.autonomy.consolidate_every_calls = local.autonomy.consolidate_every_calls;
736        }
737        if local.autonomy.consolidate_cooldown_secs
738            != AutonomyConfig::default().consolidate_cooldown_secs
739        {
740            self.autonomy.consolidate_cooldown_secs = local.autonomy.consolidate_cooldown_secs;
741        }
742        if local.terse_agent != TerseAgent::default() {
743            self.terse_agent = local.terse_agent;
744        }
745        if !local.archive.enabled {
746            self.archive.enabled = false;
747        }
748        if local.archive.threshold_chars != ArchiveConfig::default().threshold_chars {
749            self.archive.threshold_chars = local.archive.threshold_chars;
750        }
751        if local.archive.max_age_hours != ArchiveConfig::default().max_age_hours {
752            self.archive.max_age_hours = local.archive.max_age_hours;
753        }
754        if local.archive.max_disk_mb != ArchiveConfig::default().max_disk_mb {
755            self.archive.max_disk_mb = local.archive.max_disk_mb;
756        }
757    }
758
759    pub fn save(&self) -> std::result::Result<(), super::error::NebuCtxError> {
760        let path = Self::path().ok_or_else(|| {
761            super::error::NebuCtxError::Config("cannot determine home directory".into())
762        })?;
763        if let Some(parent) = path.parent() {
764            std::fs::create_dir_all(parent)?;
765        }
766        let content = toml::to_string_pretty(self)
767            .map_err(|e| super::error::NebuCtxError::Config(e.to_string()))?;
768        std::fs::write(&path, content)?;
769        Ok(())
770    }
771
772    pub fn show(&self) -> String {
773        let global_path = Self::path()
774            .map(|p| p.to_string_lossy().to_string())
775            .unwrap_or_else(|| "~/.nebu-ctx/config.toml".to_string());
776        let content = toml::to_string_pretty(self).unwrap_or_default();
777        let mut out = format!("Global config: {global_path}\n\n{content}");
778
779        if let Some(root) = Self::find_project_root() {
780            let local = Self::local_path(&root);
781            if local.exists() {
782                out.push_str(&format!("\n\nLocal config (merged): {}\n", local.display()));
783            } else {
784                out.push_str(&format!(
785                    "\n\nLocal config: not found (create {} to override per-project)\n",
786                    local.display()
787                ));
788            }
789        }
790        out
791    }
792}