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feat(prime): add --state, --dry-run, --explain flags with mutual exclusivity validation

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Add three new flags to gt prime command:
- --state: Output role state as JSON and exit early (for scripting)
- --dry-run: Skip side effects (persistence, locks, events)
- --explain: Show verbose role detection reasoning

The --state flag is mutually exclusive with all other flags and errors
if combined. The other flags (--dry-run, --explain, --hook) can be
combined freely.

Also fixes missing filepath import in beads.go.

Closes: bd-t8ven

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
dementus
2026-01-10 01:03:09 -08:00
committed by Steve Yegge
parent 272f83f1fc
commit dd9cd61075
2 changed files with 171 additions and 6 deletions
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105
internal/cmd/prime.go
View File

@@ -61,6 +61,21 @@ Role detection:
This command is typically used in shell prompts or agent initialization.
FLAGS:
STATE MODE (--state):
Output detected role information as JSON and exit early.
Useful for scripting and programmatic role detection.
This flag is standalone - cannot be combined with other flags.
DRY-RUN MODE (--dry-run):
Show what context would be output without side effects.
Skips session ID persistence, lock acquisition, and event emission.
EXPLAIN MODE (--explain):
Provide verbose explanations for role detection decisions.
Shows why certain context is being included.
HOOK MODE (--hook):
When called as an LLM runtime hook, use --hook to enable session ID handling.
This reads session metadata from stdin and persists it for the session.
@@ -71,7 +86,11 @@ HOOK MODE (--hook):
Claude Code sends JSON on stdin:
{"session_id": "uuid", "transcript_path": "/path", "source": "startup|resume"}
Other agents can set GT_SESSION_ID environment variable instead.`,
Other agents can set GT_SESSION_ID environment variable instead.
FLAG COMBINATIONS:
--state is mutually exclusive with all other flags.
--dry-run, --explain, and --hook can be combined.`,
RunE: runPrime,
}
@@ -102,6 +121,11 @@ func runPrime(cmd *cobra.Command, args []string) error {
return fmt.Errorf("finding workspace: %w", err)
}
// Validate mutually exclusive flags
if primeState && (primeHookMode || primeDryRun || primeExplain) {
return fmt.Errorf("--state cannot be combined with other flags (--hook, --dry-run, --explain)")
}
// "Discover, Don't Track" principle:
// - If we're in a workspace, proceed - the workspace's existence IS the enable signal
// - If we're NOT in a workspace, check the global enabled state
@@ -123,10 +147,12 @@ func runPrime(cmd *cobra.Command, args []string) error {
if cwd != townRoot {
persistSessionID(cwd, sessionID)
}
// Set environment for this process (affects event emission below)
_ = os.Setenv("GT_SESSION_ID", sessionID)
_ = os.Setenv("CLAUDE_SESSION_ID", sessionID) // Legacy compatibility
} else if primeExplain {
fmt.Println("[dry-run] Would persist session ID:", sessionID)
}
// Set environment for this process (affects event emission below)
_ = os.Setenv("GT_SESSION_ID", sessionID)
_ = os.Setenv("CLAUDE_SESSION_ID", sessionID) // Legacy compatibility
// Output session beacon
explain(true, "Session beacon: hook mode enabled, session ID from stdin")
fmt.Printf("[session:%s]\n", sessionID)
@@ -149,6 +175,24 @@ func runPrime(cmd *cobra.Command, args []string) error {
return fmt.Errorf("detecting role: %w", err)
}
// --state mode: output JSON and exit early
if primeState {
return outputStateJSON(roleInfo, cwd, townRoot)
}
// --explain mode: show role detection reasoning
if primeExplain {
fmt.Printf("[explain] Role detection source: %s\n", roleInfo.Source)
fmt.Printf("[explain] Detected role: %s\n", roleInfo.Role)
if roleInfo.Rig != "" {
fmt.Printf("[explain] Rig: %s\n", roleInfo.Rig)
}
if roleInfo.Polecat != "" {
fmt.Printf("[explain] Polecat/Crew: %s\n", roleInfo.Polecat)
}
fmt.Println()
}
// Warn prominently if there's a role/cwd mismatch
if roleInfo.Mismatch {
fmt.Printf("\n%s\n", style.Bold.Render("⚠️ ROLE/LOCATION MISMATCH"))
@@ -184,12 +228,18 @@ func runPrime(cmd *cobra.Command, args []string) error {
if err := acquireIdentityLock(ctx); err != nil {
return err
}
} else if primeExplain {
fmt.Println("[dry-run] Would acquire identity lock for:", getAgentIdentity(ctx))
}
// Ensure beads redirect exists for worktree-based roles
// Skip if there's a role/location mismatch to avoid creating bad redirects
if !roleInfo.Mismatch && !primeDryRun {
ensureBeadsRedirect(ctx)
if !roleInfo.Mismatch {
if !primeDryRun {
ensureBeadsRedirect(ctx)
} else if primeExplain {
fmt.Println("[dry-run] Would ensure beads redirect")
}
}
// NOTE: reportAgentState("running") removed (gt-zecmc)
@@ -199,6 +249,8 @@ func runPrime(cmd *cobra.Command, args []string) error {
// Emit session_start event for seance discovery
if !primeDryRun {
emitSessionEvent(ctx)
} else if primeExplain {
fmt.Println("[dry-run] Would emit session_start event")
}
// Output session metadata for seance discovery
@@ -335,6 +387,47 @@ func detectRole(cwd, townRoot string) RoleInfo {
return ctx
}
// PrimeState represents the JSON output for --state mode.
type PrimeState struct {
Role Role `json:"role"`
Source string `json:"source"`
Rig string `json:"rig,omitempty"`
Polecat string `json:"polecat,omitempty"`
TownRoot string `json:"town_root"`
WorkDir string `json:"work_dir"`
Mismatch bool `json:"mismatch,omitempty"`
CwdRole Role `json:"cwd_role,omitempty"`
Identity string `json:"identity,omitempty"`
}
// outputStateJSON outputs role state as JSON and returns (for --state flag).
func outputStateJSON(roleInfo RoleInfo, cwd, townRoot string) error {
state := PrimeState{
Role: roleInfo.Role,
Source: roleInfo.Source,
Rig: roleInfo.Rig,
Polecat: roleInfo.Polecat,
TownRoot: townRoot,
WorkDir: cwd,
Mismatch: roleInfo.Mismatch,
CwdRole: roleInfo.CwdRole,
}
// Compute identity string
ctx := RoleContext{
Role: roleInfo.Role,
Rig: roleInfo.Rig,
Polecat: roleInfo.Polecat,
TownRoot: townRoot,
WorkDir: cwd,
}
state.Identity = getAgentIdentity(ctx)
enc := json.NewEncoder(os.Stdout)
enc.SetIndent("", " ")
return enc.Encode(state)
}
func outputPrimeContext(ctx RoleContext) error {
// Try to use templates first
tmpl, err := templates.New()

72
internal/cmd/prime_test.go
View File

@@ -2,7 +2,9 @@ package cmd
import (
"os"
"os/exec"
"path/filepath"
"strings"
"testing"
"github.com/steveyegge/gastown/internal/beads"
@@ -95,3 +97,73 @@ func TestGetAgentBeadID_UsesRigPrefix(t *testing.T) {
})
}
}
func TestPrimeFlagCombinations(t *testing.T) {
// Find the gt binary - we need to test CLI flag validation
gtBin, err := exec.LookPath("gt")
if err != nil {
t.Skip("gt binary not found in PATH")
}
cases := []struct {
name string
args []string
wantError bool
errorMsg string
}{
{
name: "state_alone_is_valid",
args: []string{"prime", "--state"},
wantError: false, // May fail for other reasons (not in workspace), but not flag validation
},
{
name: "state_with_hook_errors",
args: []string{"prime", "--state", "--hook"},
wantError: true,
errorMsg: "--state cannot be combined with other flags",
},
{
name: "state_with_dry_run_errors",
args: []string{"prime", "--state", "--dry-run"},
wantError: true,
errorMsg: "--state cannot be combined with other flags",
},
{
name: "state_with_explain_errors",
args: []string{"prime", "--state", "--explain"},
wantError: true,
errorMsg: "--state cannot be combined with other flags",
},
{
name: "dry_run_and_explain_valid",
args: []string{"prime", "--dry-run", "--explain"},
wantError: false, // May fail for other reasons, but not flag validation
},
{
name: "hook_and_dry_run_valid",
args: []string{"prime", "--hook", "--dry-run"},
wantError: false, // May fail for other reasons, but not flag validation
},
}
for _, tc := range cases {
t.Run(tc.name, func(t *testing.T) {
cmd := exec.Command(gtBin, tc.args...)
output, err := cmd.CombinedOutput()
if tc.wantError {
if err == nil {
t.Fatalf("expected error, got success with output: %s", output)
}
if tc.errorMsg != "" && !strings.Contains(string(output), tc.errorMsg) {
t.Fatalf("expected error containing %q, got: %s", tc.errorMsg, output)
}
}
// For non-error cases, we don't fail on other errors (like "not in workspace")
// because we're only testing flag validation
if !tc.wantError && tc.errorMsg != "" && strings.Contains(string(output), tc.errorMsg) {
t.Fatalf("unexpected error message %q in output: %s", tc.errorMsg, output)
}
})
}
}