Live data, 2026-08-24 (npm registry, GitHub, shared/cc-support.json, shared/cc-adoption-gaps.json). The support floor is deliberately frozen; latest_known is how far our triage has verified; upstream is what npm ships today.
breaking 40 or 20 each, new_perm/new_field/new_command 10 or less. gap_score by version: 2.1.221: 22, 2.1.222: 80, 2.1.225: 40, 2.1.227: 20, 2.1.229: 45, 2.1.232: 99, 2.1.233: 45, 2.1.234: 65, 2.1.235: 20, 2.1.236: 32, 2.1.238: 40
| issue | version | category | gap | feature key | affected skills |
|---|---|---|---|---|---|
| #3642 | 2.1.238 | breaking | 40 | mcp_json_headers_helper_trust_gate | configure, doctor, security-patterns |
| #3620 | 2.1.222 | breaking | 20 | remote_control_autostart_user_scope | configure, setup, doctor |
| #3619 | 2.1.222 | breaking | 20 | disable_model_invocation_refusal | help, auto |
| #3618 | 2.1.222 | breaking | 20 | sendmessage_permission_classifier | agent-orchestration, chain-patterns, security-patterns |
| #3617 | 2.1.222 | breaking | 20 | pretooluse_autoallow_bg_task_bypass | agent-orchestration, security-patterns, configure |
| #3614 | 2.1.225 | breaking | 20 | sendmessage_recipient_no_swap | agent-orchestration, chain-patterns |
| #3613 | 2.1.225 | breaking | 20 | mcp_oauth_keychain_401_burst | mcp-patterns, security-patterns |
| #3602 | 2.1.227 | breaking | 20 | action_allowed_non_write_users_bash | github-operations, ci-debug |
| #3603 | 2.1.229 | breaking | 20 | commit_push_pr_dangerous_flags | commit, create-pr, github-operations |
| #3586 | 2.1.232 | breaking | 20 | gateway_desktop_overlay_schema | configure |
| #3585 | 2.1.232 | breaking | 20 | sendmessage_bare_name_delivery | agent-orchestration |
| #3584 | 2.1.232 | breaking | 20 | subagent_fork_default_background | agent-orchestration, chain-patterns, task-dependency-patterns |
| #3591 | 2.1.233 | breaking | 20 | todo_task_tools_removed_new_models | task-dependency-patterns, agent-orchestration, chain-patterns, implement, auto |
| #3595 | 2.1.234 | breaking | 20 | bg_task_notify_system_reminder | agent-orchestration, task-dependency-patterns |
| #3594 | 2.1.234 | breaking | 20 | fullscreen_restart_preserves_perms | security-patterns, configure |
| #3598 | 2.1.235 | breaking | 20 | send_message_oversize_refusal | agent-orchestration, chain-patterns |
| #3599 | 2.1.236 | breaking | 20 | send_message_burst_refusal | agent-orchestration, chain-patterns |
| #3604 | 2.1.229 | new_command | 15 | remote_control_continue_flag | (none detected) |
| #3588 | 2.1.232 | new_command | 15 | at_mention_other_session | agent-orchestration |
| #3592 | 2.1.233 | new_command | 15 | worktree_gitlab_mr_url | github-operations, create-pr, chain-patterns |
| #3596 | 2.1.234 | new_command | 15 | add_dir_midturn | configure |
| #3615 | 2.1.221 | new_perm | 12 | sandbox_credential_mask_mode | security-patterns, configure, devops-deployment |
| #3590 | 2.1.232 | new_perm | 12 | managed_sandbox_binary_approval | configure, security-patterns |
| #3589 | 2.1.232 | new_perm | 12 | gitlab_token_redaction_glab_sandbox | security-patterns, github-operations |
| #3600 | 2.1.236 | new_perm | 12 | sandbox_wildcard_read_deny_precedence | security-patterns, configure, mcp-patterns |
| #3616 | 2.1.221 | new_field | 10 | plugin_skills_root_path | configure, doctor |
| #3605 | 2.1.229 | new_field | 10 | marketplace_command_source | configure, doctor |
| #3593 | 2.1.233 | new_field | 10 | webfetch_cache_ttl_env | web-research-workflow, browser-tools, configure |
| #3597 | 2.1.234 | new_field | 10 | session_list_truncation_notice | agent-orchestration |