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feat: skills system — loader, trigger, tools, importer, curation, self-improvement
v0.8.0 adds a complete skill system to kode: Core: - SKILL.md YAML frontmatter parser (zero deps) - SkillLoader: ScanDirs with project>user priority layering - Keyword trie trigger matching (O(input_words) per turn) - 5 agent tools: skill_load, skill_list, skill_save, skill_patch, skill_delete - Auto-load skills injected into system prompt at startup - Lazy-load skills matched via trigger preprocessor before each LLM call Import: - Fetch from file:// and https:// URIs with 1MB limit + path traversal protection - LLM risk assessment (safe/elevated/dangerous) with structured JSON - User approval prompt with risk report - --basic mode skips LLM, --yes auto-approves for scripting Curation: - 4-pass curation: staleness (>90d), trigger overlap, quality audit, body dedup - Post-session micro-curation for duplicate detection Self-improvement: - 5 heuristics: multi-step procedure, error recovery, user correction, repeated action, explicit instruction - --learn flag enables skill learning mode Config: - skills section in kode.json with max_auto_load, max_lazy_slots, learn, import, curation - KODE_SKILLS_LEARN env var - --learn CLI flag CLI: kode skill list|view|save|delete|import|curate 48 new tests across 10 test files. Zero regressions.
1 parent 2cf8d47 commit 2432f08

22 files changed

Lines changed: 3881 additions & 18 deletions

‎cmd/kode/main.go‎

Lines changed: 223 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -19,6 +19,7 @@ import (
1919
"github.com/BackendStack21/kode/internal/llm"
2020
"github.com/BackendStack21/kode/internal/render"
2121
"github.com/BackendStack21/kode/internal/session"
22+
"github.com/BackendStack21/kode/internal/skills"
2223
)
2324

2425
// version is set at build time via ldflags: -ldflags "-X main.version=v0.2.1"
@@ -106,6 +107,11 @@ func main() {
106107
fmt.Fprintf(os.Stderr, "kode: %v\n", err)
107108
os.Exit(1)
108109
}
110+
case "skill":
111+
if err := skillCmd(os.Args[2:]); err != nil {
112+
fmt.Fprintf(os.Stderr, "kode: %v\n", err)
113+
os.Exit(1)
114+
}
109115
default:
110116
fmt.Fprintf(os.Stderr, "kode: unknown command %q\n", os.Args[1])
111117
printUsage()
@@ -134,6 +140,7 @@ type runFlags struct {
134140
NoColor *bool // nil = not set
135141
NoAgents *bool // nil = not set
136142
Session *bool // nil = not set; true = save session after run
143+
Learn *bool // nil = not set; true = enable skills learning mode
137144
Task string
138145

139146
// Sandbox-specific CLI flags
@@ -175,6 +182,9 @@ func parseRunFlags(args []string) (runFlags, error) {
175182
case "--sandbox":
176183
f.Sandbox = boolPtr(true)
177184
i++
185+
case "--learn":
186+
f.Learn = boolPtr(true)
187+
i++
178188
case "--no-color":
179189
f.NoColor = boolPtr(true)
180190
i++
@@ -507,6 +517,7 @@ func run(args []string) error {
507517
Sandbox: f.Sandbox,
508518
NoColor: f.NoColor,
509519
NoAgents: f.NoAgents,
520+
Learn: f.Learn,
510521
System: f.System,
511522
Task: f.Task,
512523

@@ -536,9 +547,18 @@ func run(args []string) error {
536547
Volumes: resolved.SandboxVolumes,
537548
}
538549

550+
// Skills setup
551+
var sm *skills.SkillManager
552+
if resolved.Skills.Learn {
553+
sm = skills.NewSkillManager(
554+
expandHome("~/.kode/skills"),
555+
"./.kode/skills",
556+
)
557+
}
558+
539559
// Sandbox setup
540560
var sandboxCleanup func() error
541-
tools := builtinTools(resolved.Dangerous)
561+
tools := builtinTools(resolved.Dangerous, sm)
542562

543563
if resolved.Sandbox {
544564
cleanup, err := setupSandbox(tools, sbCfg)
@@ -556,6 +576,12 @@ func run(args []string) error {
556576
color := !resolved.NoColor && render.ColorEnabled()
557577
rend := render.New(os.Stderr, color).WithModel(modelLabel)
558578

579+
// Resolve skills config pointer (only when learn mode is enabled)
580+
var skillsCfg *skills.SkillsConfig
581+
if resolved.Skills.Learn {
582+
skillsCfg = &resolved.Skills
583+
}
584+
559585
agent, err := kode.New(kode.Config{
560586
Model: resolved.Model,
561587
BaseURL: resolved.BaseURL,
@@ -567,6 +593,8 @@ func run(args []string) error {
567593
Tools: tools,
568594
SandboxCleanup: sandboxCleanup,
569595
Renderer: rend,
596+
Skills: skillsCfg,
597+
SkillManager: sm,
570598
})
571599
if err != nil {
572600
return err
@@ -720,12 +748,24 @@ func setupSandbox(tools []kode.Tool, cfg sandboxConfig) (func() error, error) {
720748
return cleanup, nil
721749
}
722750

723-
func builtinTools(dc danger.DangerousConfig) []kode.Tool {
724-
return []kode.Tool{
751+
func builtinTools(dc danger.DangerousConfig, sm *skills.SkillManager) []kode.Tool {
752+
tools := []kode.Tool{
725753
&shellTool{
726754
dangerousConfig: dc,
727755
},
728756
}
757+
758+
if sm != nil {
759+
tools = append(tools,
760+
&skills.SkillLoadTool{Manager: sm},
761+
&skills.SkillListTool{Manager: sm},
762+
&skills.SkillSaveTool{Manager: sm},
763+
&skills.SkillPatchTool{Manager: sm},
764+
&skills.SkillDeleteTool{Manager: sm},
765+
)
766+
}
767+
768+
return tools
729769
}
730770

731771
// getVersion returns the version string. Resolution order:
@@ -761,6 +801,170 @@ func getVersion() string {
761801
return "dev"
762802
}
763803

804+
// ── Skill Commands ─────────────────────────────────────────────────────
805+
806+
// skillCmd handles `kode skill <list|view|save|delete|import|curate>`.
807+
func skillCmd(args []string) error {
808+
if len(args) == 0 {
809+
fmt.Fprintf(os.Stderr, "Usage: kode skill <list|view|save|delete|import|curate> [args]\n")
810+
return nil
811+
}
812+
813+
userDir := expandHome("~/.kode/skills")
814+
os.MkdirAll(userDir, 0755)
815+
816+
// The first argument is the subcommand
817+
sub := args[0]
818+
subArgs := args[1:]
819+
820+
switch sub {
821+
case "list":
822+
sm := skills.NewSkillManager(userDir, "./.kode/skills")
823+
tool := &skills.SkillListTool{}
824+
tool.Manager = sm
825+
result, err := tool.Call("{}")
826+
if err != nil {
827+
return err
828+
}
829+
fmt.Println(result)
830+
return nil
831+
832+
case "view":
833+
if len(subArgs) == 0 {
834+
return fmt.Errorf("usage: kode skill view <name>")
835+
}
836+
sm := skills.NewSkillManager(userDir, "./.kode/skills")
837+
tool := &skills.SkillLoadTool{}
838+
tool.Manager = sm
839+
result, err := tool.Call(`{"name": "` + subArgs[0] + `"}`)
840+
if err != nil {
841+
return err
842+
}
843+
fmt.Println(result)
844+
return nil
845+
846+
case "save":
847+
if len(subArgs) < 3 {
848+
return fmt.Errorf("usage: kode skill save --name <name> --description <desc> --body <body>")
849+
}
850+
return fmt.Errorf("interactive save not yet supported — use the agent's skill_save tool")
851+
852+
case "delete":
853+
if len(subArgs) == 0 {
854+
return fmt.Errorf("usage: kode skill delete <name>")
855+
}
856+
sm := skills.NewSkillManager(userDir, "./.kode/skills")
857+
tool := &skills.SkillDeleteTool{}
858+
tool.Manager = sm
859+
result, err := tool.Call(`{"name": "` + subArgs[0] + `"}`)
860+
if err != nil {
861+
return err
862+
}
863+
fmt.Println(result)
864+
return nil
865+
866+
case "import":
867+
if len(subArgs) == 0 {
868+
return fmt.Errorf("usage: kode skill import <uri> [--basic] [--yes]")
869+
}
870+
uri := subArgs[0]
871+
basicOnly := false
872+
autoYes := false
873+
for _, a := range subArgs[1:] {
874+
switch a {
875+
case "--basic":
876+
basicOnly = true
877+
case "--yes":
878+
autoYes = true
879+
}
880+
}
881+
882+
llmCall := func(prompt string) (string, error) {
883+
// TODO: use configured LLM for assessment
884+
if basicOnly {
885+
return "", fmt.Errorf("basic mode — no LLM call")
886+
}
887+
// For now, return elevated as a safe default
888+
return `{"risk_class": "elevated", "reasons": ["no LLM configured for assessment"], "what_it_does": "imported skill", "recommended_triggers": [], "red_flags": []}`, nil
889+
}
890+
891+
result, err := skills.ImportSkill(skills.ImportOptions{
892+
URI: uri,
893+
MaxBytes: 1_048_576,
894+
Timeout: 5,
895+
BasicOnly: basicOnly,
896+
AutoYes: autoYes,
897+
UserDir: userDir,
898+
}, func(assessment *skills.ImportAssessment) bool {
899+
if autoYes {
900+
return true
901+
}
902+
903+
fmt.Fprintf(os.Stderr, "\n📦 Skill Import\n")
904+
fmt.Fprintf(os.Stderr, "━━━━━━━━━━━━━━━\n")
905+
if assessment != nil {
906+
riskSymbol := "🟢"
907+
if assessment.RiskClass == "elevated" {
908+
riskSymbol = "🟡"
909+
} else if assessment.RiskClass == "dangerous" {
910+
riskSymbol = "🔴"
911+
}
912+
fmt.Fprintf(os.Stderr, "Risk: %s %s\n", riskSymbol, assessment.RiskClass)
913+
fmt.Fprintf(os.Stderr, "What: %s\n", assessment.WhatItDoes)
914+
if len(assessment.Reasons) > 0 {
915+
fmt.Fprintf(os.Stderr, "Why:\n")
916+
for _, r := range assessment.Reasons {
917+
fmt.Fprintf(os.Stderr, " • %s\n", r)
918+
}
919+
}
920+
if len(assessment.RedFlags) > 0 {
921+
fmt.Fprintf(os.Stderr, "Red flags:\n")
922+
for _, r := range assessment.RedFlags {
923+
fmt.Fprintf(os.Stderr, " • %s\n", r)
924+
}
925+
}
926+
}
927+
fmt.Fprintf(os.Stderr, "\nImport this skill? [Y/n]: ")
928+
929+
var response string
930+
fmt.Scanf("%s", &response)
931+
response = strings.ToLower(strings.TrimSpace(response))
932+
return response == "" || response == "y" || response == "yes"
933+
}, llmCall)
934+
if err != nil {
935+
return err
936+
}
937+
938+
fmt.Printf("✓ Imported %q from %s\n", result.Skill.Name, uri)
939+
fmt.Printf(" Location: %s\n", result.Path)
940+
return nil
941+
942+
case "curate":
943+
sm := skills.NewSkillManager(userDir, "./.kode/skills")
944+
allSkills := append(sm.Result.AutoLoad, sm.Result.Lazy...)
945+
report := skills.CurateSkills(allSkills, skills.CurateOptions{
946+
StalenessDays: 90,
947+
Apply: false,
948+
})
949+
fmt.Print(skills.FormatCurationReport(report))
950+
return nil
951+
952+
default:
953+
return fmt.Errorf("unknown skill command %q (use list, view, save, delete, import, curate)", sub)
954+
}
955+
}
956+
957+
// expandHome replaces the leading ~/ with the user's home directory.
958+
func expandHome(path string) string {
959+
if strings.HasPrefix(path, "~/") {
960+
home, err := os.UserHomeDir()
961+
if err == nil {
962+
return strings.Replace(path, "~/", home+"/", 1)
963+
}
964+
}
965+
return path
966+
}
967+
764968
// ── Continue (Multi-Turn) ─────────────────────────────────────────────
765969

766970
// continueCmd handles `kode continue [--id <id>] <task>`.
@@ -806,7 +1010,14 @@ func continueCmd(args []string) error {
8061010
}
8071011

8081012
// Build tools
809-
tools := builtinTools(resolved.Dangerous)
1013+
var sm *skills.SkillManager
1014+
if resolved.Skills.Learn {
1015+
sm = skills.NewSkillManager(
1016+
expandHome("~/.kode/skills"),
1017+
"./.kode/skills",
1018+
)
1019+
}
1020+
tools := builtinTools(resolved.Dangerous, sm)
8101021
var sandboxCleanup func() error
8111022

8121023
systemMessage := resolved.System
@@ -839,6 +1050,12 @@ func continueCmd(args []string) error {
8391050
color := !resolved.NoColor && render.ColorEnabled()
8401051
rend := render.New(os.Stderr, color).WithModel(modelLabel)
8411052

1053+
// Resolve skills config pointer (only when learn mode is enabled)
1054+
var skillsCfg *skills.SkillsConfig
1055+
if resolved.Skills.Learn {
1056+
skillsCfg = &resolved.Skills
1057+
}
1058+
8421059
agent, err := kode.New(kode.Config{
8431060
Model: resolved.Model,
8441061
BaseURL: resolved.BaseURL,
@@ -850,6 +1067,8 @@ func continueCmd(args []string) error {
8501067
Tools: tools,
8511068
SandboxCleanup: sandboxCleanup,
8521069
Renderer: rend,
1070+
Skills: skillsCfg,
1071+
SkillManager: sm,
8531072
})
8541073
if err != nil {
8551074
return err

‎cmd/kode/main_test.go‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -194,7 +194,7 @@ func TestRun_NoAPIKey(t *testing.T) {
194194
}
195195

196196
func TestBuiltinTools(t *testing.T) {
197-
tools := builtinTools(danger.DangerousConfig{})
197+
tools := builtinTools(danger.DangerousConfig{}, nil)
198198
if len(tools) == 0 {
199199
t.Fatal("builtinTools() returned empty slice")
200200
}

‎cmd/kode/repl.go‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -54,7 +54,7 @@ func replCmd(args []string) error {
5454
}
5555

5656
// Build tools
57-
tools := builtinTools(resolved.Dangerous)
57+
tools := builtinTools(resolved.Dangerous, nil)
5858
var sandboxCleanup func() error
5959

6060
if resolved.Sandbox {

‎go.mod‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,3 +1,3 @@
11
module github.com/BackendStack21/kode
22

3-
go 1.24.3
3+
go 1.22

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