refactor(workspace): normalize skill-related env and prompt

internal/agent/prompt.go

@@ -8,6 +8,8 @@ import (
 	"strconv"
 	"strings"
 	"time"
+
+	skillset "github.com/memohai/memoh/internal/skills"
 )
 
 //go:embed prompts/*.md
@@ -205,7 +207,8 @@ func buildSkillsSection(skills []SkillEntry) string {
 	})
 	var sb strings.Builder
 	sb.WriteString("## Skills\n\n")
-	sb.WriteString("Skills are stored in `{{home}}/skills/`. ")
+	sb.WriteString("Memoh-managed skills are stored in `" + skillset.ManagedDir() + "/`. ")
+	sb.WriteString("Compatible external skill directories inside the bot container may also be discovered automatically. ")
 	sb.WriteString("Each skill is a `SKILL.md` file inside a named subdirectory.\n\n")
 	sb.WriteString("Call `use_skill` with the skill name to load its full instructions before following them. ")
 	sb.WriteString("Only activate a skill when it is relevant to the current task.\n\n")