JuliusBrussee/caveman · error

githubapp: decode token response: %w

Error message

githubapp: decode token response: %w

What it means

MintInstallationToken got a 201 from GitHub's access_tokens endpoint but the body did not decode into the InstallationToken struct. GitHub returned success with an unexpected payload — likely an API contract change, an HTML interstitial, or a proxy mangling the response.

Source

Thrown at shared/platform/githubapp/githubapp.go:221

		}
		scopedPermissions[name] = level
	}
	jwt, err := a.AppJWT()
	if err != nil {
		return InstallationToken{}, err
	}
	body := map[string]any{"permissions": scopedPermissions, "repositories": []string{repository}}
	status, raw, err := a.do(ctx, "Bearer "+jwt, http.MethodPost,
		"/app/installations/"+strconv.FormatInt(installationID, 10)+"/access_tokens", body)
	if err != nil {
		return InstallationToken{}, err
	}
	if status != http.StatusCreated {
		return InstallationToken{}, fmt.Errorf("githubapp: mint token: HTTP %d: %s", status, snippet(raw))
	}
	var out InstallationToken
	if err := json.Unmarshal(raw, &out); err != nil {
		return InstallationToken{}, fmt.Errorf("githubapp: decode token response: %w", err)
	}
	if out.Token == "" {
		return InstallationToken{}, fmt.Errorf("githubapp: token response carried no token")
	}
	return out, nil
}

// RevokeToken DELETEs /installation/token authenticated with the token itself —
// the job-end "drop all agency" step. A best-effort revoke; the ~1h natural
// expiry is the backstop.
func (a *App) RevokeToken(ctx context.Context, token string) error {
	status, raw, err := a.do(ctx, "Bearer "+token, http.MethodDelete, "/installation/token", nil)
	if err != nil {
		return err
	}
	if status != http.StatusNoContent {
		return fmt.Errorf("githubapp: revoke token: HTTP %d: %s", status, snippet(raw))
	}

View on GitHub (pinned to 766dce6b13)

Solutions

1. Retry the mint; if persistent, inspect the raw body for API schema drift
2. Confirm the API version header matches the expected response format

When it happens

Trigger: Thrown at shared/platform/githubapp/githubapp.go:221 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of JuliusBrussee/caveman@766dce6b13 (2026-08-18). Data as JSON: /api/errors/b6fa95d8eef5664e. Report an issue: GitHub.