Radar brief — 2026-09-12

What the evidence shows

GitHub release notes carry the load this window (Claude Code, Codex CLI, Goose, Cline, Antigravity, OpenCode). HTML changelogs for Windsurf, Kiro, Tabnine, and Factory Droid are noisier: duplicate Kiro pages, mixed older patches, and one source in the mix reported errors. Several high-score notes omit most of the changelog (bodyOmitted 97–147), so only the listed items below are fair game.

For developers

• Score plugins, don’t eyeball them. On Claude Code v2.1.269 run claude plugin eval --help and keep the JSON/HTML report next to the plugin. Use /output-style in remote/cloud sessions so logs match local ones. Turn on Bash edit diffs (bashEditDiffEnabled) when the agent is rewriting files through the shell.
• Isolate Codex experiments. rust-v0.154.0: pick GPT-6-Astra only if you want that catalog entry; use --worktree / /worktree for forked sessions instead of dirtying the main checkout. rust-v0.153.0: install plugins via the marketplace CLI, set tui.auto_recap = false if recaps eat the buffer, and expect Vim u / Ctrl+R to keep pasted drafts.
• Upgrade Cline CLI before MCP. cli-v3.0.61 is a reliability patch: stale Hub prompt (Enter replaces, Esc keeps), 10s MCP connect budget, and restored tools/images for catalogs that advertised empty capabilities. Desktop-v0.0.26 PR/CI in the composer needs gh signed in and a GitHub.com origin; Cline still will not push or open the PR for you. Install that CLI if you want the live PR row.
• Pin Goose providers and hooks. v1.48.0 is a routing release: GLM-5.3 replaces 5.2, GPT-5.6 can go through Bedrock, and PreToolUse gains on_failure plus a stable tool_call_id. Treat new declarative providers as config you review, not defaults you inherit.
• Antigravity / OpenCode / Zed. Antigravity 1.2.1: excludeDefaultComponents: true for skinny custom agents; --continue now prefers the last non-empty workspace conversation. OpenCode v1.18.26: Claude 5 thinking-block failures after prompt/tool edits should stop; Bedrock GPT-5.6 can use none effort. Zed v1.19.0-pre is a preview — try OpenRouter effort and long-session memory, don’t standardize on it.
• Kiro V3 hygiene. /sessions (or kiro-cli chat --sessions) to resume/clean local and cloud sessions; /config to see whether agents/MCP/Skills/Hooks are local, cloud, or both. Only enable “Apply your cloud configuration to local sessions” if you want cloud Steering/agents/Skills without writing them into local .kiro.
• Windsurf muscle memory. Saved SSH hosts and transcript reconnect are the feature. Drop Cascade-era commands (new-agent option, annotations, conversation mentions, Vibe & Replace, Deploy, workflow commands, automatic Lifeguard). ACP is no longer optional.

For teams

• Treat Codex rust-v0.154.0 as a trust + MCP release, not just a model drop. Startup now waits for trust before workspace-controlled helpers; macOS sandbox blocks terminal input injection; MCP coordinates OAuth refresh and will not auto-replay rejected tools. Remote resume/fork keeps saved permissions; forks follow server model defaults unless overridden. Decide explicitly whether GPT-6-Astra is an org default. rust-v0.153.0 Full Access skipping Guardian on confirmation-only actions is a policy change — don’t assume reviews still fire.
• Instrument Claude Code before raising concurrency. CLAUDE_CODE_WORKFLOW_MAX_CONCURRENT_AGENTS (1–256) is for inference-bound fan-out. Pair it with OTEL_METRICS_INCLUDE_REPOSITORY / OTEL_LOG_TOOL_DETAILS so spend and tool events carry vcs.*. CLAUDE_CODE_GATEWAY_MODEL_DISCOVERY_TIMEOUT_MS only if /v1/models is slow (default 3s). Use claude plugin eval as a gate for internal plugins.
• Goose routing is now a cost and safety surface. Declarative providers plus custom cost fields mean finance can track non-catalog models; GLM-5.3 is a breaking model swap from 5.2. Review PreToolUse on_failure before rolling hooks org-wide.
• Cline Hub and Windows. Require cli-v3.0.61 so old Hubs drain in-flight turns instead of serving stale code, and so Windows binaries are Authenticode-signed (blocked launches now print a real error). Desktop PR status is gh-only and GitHub.com-only.
• Windsurf + Kiro config sync are team decisions. Windsurf: MCP auth opens the provider; Docker MCP from the registry should launch; cloud “Allowlist N domains” matches the web app. Archiving a cloud session with open PRs offers to close them and archives children. Kiro: cloud → local config apply avoids writing files locally — useful for managed Steering/Skills, risky if laptops should stay air-gapped from cloud agent defs.
• Factory default model moved. v0.209.0 sessions with no model selected now land on GPT-5.6 Sol; CLI no longer blocks startup on slow org settings (settings apply when they arrive). The v0.208.1 60% GPT/Grok discount is a billing promo, not a capability change. Credit exhaustion now suggests a Droid Core model instead of a retired one.
• Antigravity MCP schemas. Open object schemas ({"type":"object"} / additionalProperties: true) are no longer rejected for extra args — tighten tool definitions if you relied on that accidental strictness.

What to ignore

• Omitted changelog bulk. Claude (+97), Codex 0.154.0 (+147) / 0.153.0 (+95), Goose (+98), Zed (+50), Cline desktop (+36) / CLI (+18) are not extra features you can plan around.
• Duplicate / HTML noise. Two Kiro 2.21.3 pages tell the same V3 story; Tabnine’s 6.5.4 note also dumps 6.5.3 and 6.5.2; Factory’s discount note is marketing. Trusted GitHub/changelog mix is only 49%, and one source reported errors — don’t treat Windsurf/Kiro/Tabnine/Factory HTML as equivalent to the GitHub tags above.
• Zed v1.19.0-pre as a team baseline. Editor + agent polish, still a prerelease.
• Open proposals that name versions not in this evidence (Goose v1.50.0, a Cline “Claude Fable 5.1” pin, Grok CLI prompt-tag rename). This brief will not invent those releases.

Watch next

• Whether Codex --worktree stays experimental and whether GPT-6-Astra becomes the Bedrock default rather than a picker entry.
• Whether claude plugin eval reports become an actual plugin CI gate, and whether the omitted Claude/Codex “breaking” tags show up as follow-on notes.
• Goose provider sprawl vs. cost-field tracking; GLM-5.3 regressions vs. 5.2.
• Windsurf fallout from deleted Cascade entry points and always-on ACP.
• Cline Hub drain behavior on wedged Hubs (left alone, not killed) and MCP 10s timeouts in large remote-MCP fleets.
• Eight open improvement proposals, including: run claude plugin eval; Codex GPT-6-Astra + worktrees; Cline gh for PR/CI; Windsurf saved SSH hosts; Kiro cloud-config-on-local.

How to use DevAgentRadar

DevAgentRadar ranks versioned evidence (prefer GitHub tags and changelogs) across coding assistants and writes a public brief from what those notes actually say — not launch posts. Use For developers as local CLI/IDE actions, For teams as defaults, trust, MCP, and billing policy. Ignore omitted changelog tails, duplicate HTML pages, and any proposal that cites a version this brief does not. Re-check the radar when a tagged breaking, surface:mcp, or security release lands; 23 assistants are tracked, this window used 15 signals.

Evidence appendix

• Evidence window: top curated signals (versioned releases preferred)
• Assistants tracked: 23
• Signals in this brief: 15
• Trusted source mix (GitHub/changelog vs HTML): 49%
• Open improvement proposals: 8
• Sources reporting errors: 1

High-signal releases used

• Claude Code v2.1.269: Added claude plugin eval: run a plugin's eval suite against Claude Code and get scored, reproducible results (JSON + HTML report); see `claude plugin eval --h — source

• OpenAI Codex CLI rust-v0.154.0: GPT-6-Astra is now available in the model picker and Amazon Bedrock catalogs. (#42879, #42619) · Experimental worktree support lets you create isolated checkout — source

• Goose v1.48.0: TrustedRouter declarative provider #11422 · OpenCode Zen gateway as a declarative provider [#10939](https://gi — source

• Zed AI v1.19.0-pre: This week's release includes call hierarchy support, multi-select in the Git Panel, automatic language detection for untitled buffers, and project search on typ — source

• Cline desktop-v0.0.26: The composer now shows the current branch's GitHub pull request — PR number, merge status, changed-line totals, and CI checks. · Click through to open it in you — source

• Google Antigravity 1.2.1: Added support for excludeDefaultComponents: true in custom agent Markdown frontmatter, allowing custom agents to opt out of default prompt sections and built- — source

• OpenAI Codex CLI rust-v0.153.0: Vim mode now supports undo with u and redo with Ctrl+R, preserving complete drafts including pasted content and attachments. ([#41941](https://github.com/op — source

• Cline cli-v3.0.61: Cline now handles a running Hub that is older than your CLI. · Instead of quietly talking to a hub executing stale code, you get a prompt showing how many activ — source

• OpenCode v1.18.26: Claude 5 sessions now tolerate stale thinking blocks instead of failing after prompt or tool changes. · Bedrock GPT-5.6 models now accept none reasoning effor — source

• Windsurf v3.10.23: v3.10.23 September 10, 2026 Devin Desktop Remote agent hosts: connect to agents over SSH from the location selector, with saved hosts, status dots, and a server — source

• Kiro v2.21.3: 2.21.3 Sep 10, 2026 · 2.21.2 Sep 8, 2026 · 2.21.1 Sep 3, 2026 Session Dashboard, Configuration Panel, and Cloud Sync Browse and manage local and cloud sessions, — source

• Kiro 2.21.3 — Sep 10, 2026: September 1, 2026 Session Dashboard, Configuration Panel, and Cloud Sync · 2.21.0 · Browse and manage local and cloud sessions, inspect configured resources, an — source

• Tabnine v6.5.4: v6.5.4 August 30, 2026 Bug Fixes Tabnine CLI: Provenance & Attribution : Fixed attribution feedback being dropped after tool inputs were edited via VS Code diff — source

• Factory Droid v0.209.0 — · Desktop v0.166.0 (September 1, 2026): Session archiving from chat, a new default model, faster startup, and steadier app views · Archive sessions from chat - Archive the current session with /ar — source

Open proposals

• Install gh CLI so Cline composer shows live PR and CI status (audience: developer, P5)
• Add saved SSH agent hosts in Windsurf and drop Cascade commands (audience: team, P5)
• Run claude plugin eval to score plugins with JSON and HTML reports (audience: team, P5)
• Upgrade Goose to v1.50.0 and enable GPT-6 Astra with goose-agent tool calling (audience: team, P5)
• Switch Codex CLI to GPT-6-Astra and isolated --worktree checkouts (audience: everyone, P5)
• Enable Apply your cloud configuration to local Kiro CLI V3 sessions (audience: developer, P4)
• Pin Cline models after the v3.0.61 switch to Claude Fable 5.1 (audience: everyone, P4)
• Replace <output_efficiency> with <response_guidelines> in Grok CLI prompts (audience: developer, P4)