NeMo Relay 0.4.0

We are proud to release NeMo Relay 0.4.0!

Key Features

• 🛡️ First-party PII redaction plugin with deterministic local backend support
• 🚦 Built-in NeMo Guardrails local backend support, so the nemo_guardrails component can run against either remote services or a Python-backed local worker.
• ⚙️ Code-driven plugin configuration layered over materialized global, project, and user plugin files while preserving documented precedence.
• 📡 Streaming ATOF export endpoints for HTTP POST, WebSocket, and long-lived NDJSON collectors.
• 🗄️ ATIF HTTP storage export support alongside S3-compatible trajectory storage.
• 💸 Pricing-aware LLM observability with model-pricing lookup, cost layering, and cost metadata propagated into ATIF, OpenInference, and OpenTelemetry output.
• 🧭 Stronger coding-agent trace fidelity across Hermes, OpenClaw, Claude Code, and Codex, including nested subagent lineage, routed-provider spans, and error-path consistency.
• 🧩 Improved framework integration behavior for LangChain, LangGraph, and Deep Agents, including serialization fixes, callback coverage, and model-response annotations.
• 🔌 Host plugin installation for Claude Code and Codex, including native plugin manifests, and install/uninstall/doctor --plugin subcommands.

What's Changed

💥 Breaking Changes

• chore(guardrails)!: remove python-only guardrails example plugin by @afourniernv in #198

✨ New Features

• feat: Improve Hermes Relay hook injection and event alignment by @yczhang-nv in #205
• feat: add nested subagent session lineage for OpenClaw by @mnajafian-nv in #210
• feat: add ATIF HTTP storage export by @willkill07 in #231
• feat: add streaming ATOF endpoints by @willkill07 in #232
• feat: add LLM cost layering and pricing lookup by @AjayThorve in #236
• feat: add local backend for built-in nemo guardrails by @afourniernv in #197
• feat: layer code-driven plugin config over materialized file configs by @zhongxuanwang-nv in #211
• feat: add claude code and codex plugins by @willkill07 in #224
• feat: add PII redaction plugin crate with local backend by @afourniernv in #245

⚡ Improvements

• refactor: reduce SonarQube complexity findings by @willkill07 in #243

🐛 Bug Fixes

• fix: pass a real ScopeHandle to Node withScope callbacks by @zhongxuanwang-nv in #196
• fix: improve OpenClaw observability consistency by @mnajafian-nv in #203
• fix: remove race condition in LC integration tests by @dagardner-nv in #202
• fix: improve OpenClaw observability cost consistency by @mnajafian-nv in #206
• fix: add flattened OpenInference LLM attributes for annotations and replay by @mnajafian-nv in #207
• fix: Fix LangChain input serialization in callback handler and fix deadlock in plugin context manager by @dagardner-nv in #208
• fix: tighten OpenClaw ATOF hook-backed provenance metadata by @mnajafian-nv in #209
• fix: suppress Claude Code lifecycle noise by @AjayThorve in #213
• fix: preserve structured ATIF tool results by @dnandakumar-nv in #223
• fix: validate Hermes routed provider observability by @mnajafian-nv in #222
• fix: preserve Hermes error-path export consistency by @mnajafian-nv in #229
• fix: preserve Hermes tool-result ATIF observations by @mnajafian-nv in #233
• fix: resolve sanitized LLM request from annotations by @fallintoplace in #241
• fix: avoid ATIF shutdown subscriber deadlock by @willkill07 in #242
• fix: annotate Deep Agents model responses by @willkill07 in #246
• fix: include pii redaction in version updates by @willkill07 in #251
• fix: configure gateway body limits by @willkill07 in #261

✅ Tests

• test: validate OpenClaw nested subagent exports by @mnajafian-nv in #214
• test: validate OpenClaw placeholder replay exports by @mnajafian-nv in #217
• test: tighten Hermes wrapped observability contract by @mnajafian-nv in #215
• test: validate OpenClaw model timing diagnostic exports by @mnajafian-nv in #218
• test: cover Hermes wrapped ATIF fidelity and cost by @mnajafian-nv in #219
• test: validate OpenClaw hook-only fallback exports by @mnajafian-nv in #220
• test: add NeMo Relay skill eval datasets by @abhisawa-Nvidia in #225
• test: validate Hermes routed provider OpenInference spans by @mnajafian-nv in #235
• test: add Codex observability contract coverage by @yczhang-nv in #234
• test: regenerate NeMo Relay evals by @abhisawa-Nvidia in #226
• test: validate Hermes subagent lineage and orphan export coverage by @mnajafian-nv in #240
• test(wasm): drop --test-force-exit to avoid Windows libuv abort by @zhongxuanwang-nv in #247
• test: raise Rust and CLI coverage by @willkill07 in #259

🧰 Maintenance

• chore: prepare 0.3 code freeze by @willkill07 in #177
• ci: snapshot release docs from tag source by @willkill07 in #194
• ci: use current docs helper for release snapshots by @willkill07 in #195
• ci: stop nightly alpha tags for release 0.3 by @willkill07 in #204
• ci: add NVSkills CI request workflow by @keshprad in #228
• chore: update dependencies by @willkill07 in #239
• chore: Set status on OTel spans by @dagardner-nv in #221
• chore: update codeowners by @willkill07 in #244
• chore: isolate Rust tests and address Sonar issues by @willkill07 in #257

📝 Documentation Updates

• docs: flush subscribers before deregister in package README examples by @zhongxuanwang-nv in #201
• docs: register plugin kind before activating it in the plugin guide by @zhongxuanwang-nv in #200
• docs: clarify Hermes integration paths by @mnajafian-nv in #249
• docs: clarify exporter failure behavior by @willkill07 in #254
• docs: pii redaction documentation by @afourniernv in #252
• docs: update 0.4 release notes by @willkill07 in #262
• docs: improve Relay onboarding flow by @willkill07 in #256

New Contributors

• @dnandakumar-nv made their first contribution in #223
• @abhisawa-Nvidia made their first contribution in #225
• @keshprad made their first contribution in #228
• @fallintoplace made their first contribution in #241

NeMo Relay 0.3.0

We are proud to release NeMo Relay 0.3.0!

Key Features

• ✨ NeMo Flow is now NeMo Relay, with refreshed package guidance, docs, and runtime-facing naming.
• 🛡️ Built-in NeMo Guardrails plugin support, including plugin configuration, remote backend support, and CLI editor workflows.
• 🌐 ATIF v1.7 export support with nested subagents, improved tool-observation correlation, and S3-compatible trace storage.
• ⚡️ Non-blocking subscriber delivery with flush APIs for deterministic tests and exporter output.
• 🧠 Adaptive plugin support for CLI and OpenClaw workflows, including editor support for adaptive configuration.
• 📜 Streaming LLM chunk marks for more precise streaming trace inspection.
• 🐍 Python plugin context manager support for cleaner plugin initialization and teardown.
• 📚 New Fern documentation site with release notes, guardrails docs, runtime primer, trace incident runbook, plugin-building, migration, and adaptive tuning guidance.
• 💻 CLI binaries installable through cargo binstall nemo-relay-cli

What's Changed

💥 Breaking Changes

• refactor: narrow core runtime registry surface by @willkill07 in #136
• refactor: rename to NeMo Relay by @willkill07 in #141
• perf!: make subscriber delivery non-blocking by @willkill07 in #170

✨ New Features

• feat: add nemo_guardrails plugin contract by @afourniernv in #131
• feat: expose canonical ATOF event JSON across bindings by @bbednarski9 in #132
• feat: enable adaptive plugin for CLI and OpenClaw by @willkill07 in #128
• feat: add adaptive plugin editor support by @willkill07 in #129
• feat: Add streaming LLM chunk marks by @yczhang-nv in #134
• feat: Integrate security guardrails for agent calls by @yczhang-nv in #135
• feat: Emit guardrail scopes for conditional guardrails by @yczhang-nv in #133
• feat: Add a Python context manager for plugins by @dagardner-nv in #154
• feat: implement nemo_guardrails remote backend by @afourniernv in #144
• feat: upgrade exporters for ATIF v1.7 with nested subagents by @bbednarski9 in #160
• feat: add guardrails plugin editor support by @willkill07 in #166
• feat: Add first-class storage export support for ATIF traces to S3 by @billxbf in #163

⚡ Improvements

• refactor: reduce sonar cognitive complexity by @willkill07 in #167

🐛 Bug Fixes

• fix: emit LLM start before execution intercepts by @willkill07 in #125
• fix: align coding agent trace scopes by @willkill07 in #130
• fix(banner): update launch banner to "NEMO RELAY" by @bbednarski9 in #150
• fix: Improved LangChain serialization by @dagardner-nv in #165
• fix: correlate ATIF tool observations by @willkill07 in #171
• fix: preserve OpenClaw tool call replay visibility by @willkill07 in #178
• fix: repair Hermes shutdown-only ATIF artifacts by @bbednarski9 in #182
• fix: Dedupe overlapping LLM spans in ATIF export by @bbednarski9 in #183
• fix: register adaptive plugin in doctor by @willkill07 in #186
• fix: repair Hermes gateway session fallback by @bbednarski9 in #189

✅ Tests

• test: add ATIF trace correlation coverage by @willkill07 in #126
• test: improve core coverage for guardrails by @willkill07 in #161

🧰 Maintenance

• chore: prepare 0.2 code freeze by @dagardner-nv in #103
• chore: bump OpenClaw node dependency to 0.3.0 by @willkill07 in #113
• chore: Add path filters for integrations by @dagardner-nv in #122
• ci: add cli draft release assets by @willkill07 in #124
• chore: address Sonar scan findings by @willkill07 in #137
• chore: Set minimum Node.js version to 24 by @dagardner-nv in #146
• ci: consolidate Fern docs publishing by @willkill07 in #155
• ci: check Fern broken links by @willkill07 in #157
• ci: align Fern CLI dependency pin by @willkill07 in #158
• chore: bump dependency versions by @willkill07 in #159
• ci: enable ATIF S3 storage tests by @willkill07 in #168

📝 Documentation Updates

• docs: bump docs to align with 0.3 by @willkill07 in #121
• docs: clarify managed LLM start event ordering by @willkill07 in #127
• docs: add adaptive tuning skills by @mnajafian-nv in #138
• docs: add build plugin skill by @mnajafian-nv in #139
• docs: add migration guide by @mnajafian-nv in #140
• docs: fix docs build and add migration skill by @willkill07 in #148
• docs: add agent runtime primer by @mnajafian-nv in #145
• docs: add trace incident runbook by @mnajafian-nv in #149
• docs: switch over to fern by @willkill07 in #123
• docs: fix broken documentation links by @willkill07 in #156
• docs: agent runtime primer mermaid diagram docs fix by @bbednarski9 in #162
• docs: add built-in guardrails plugin docs by @afourniernv in #164
• docs: clarify Codex gateway config by @willkill07 in #169
• docs: update documentation URL by @willkill07 in #174
• docs: mention immutability of LLMRequest in Python bindings by @dagardner-nv in #175
• docs: fix stale naming and add Quick Start binding cards by @zhongxuanwang-nv in #188
• docs: update 0.3 release documentation by @willkill07 in #180

New Contributors

• @yczhang-nv made their first contribution in #134
• @billxbf made their first contribution in #163
• @zhongxuanwang-nv made their first contribution in #188

Full Changelog: 0.2.0...0.3.0

NeMo Relay 0.3.0 Release Candidate 1

0.3.0-rc.1

NeMo Reley 0.3.0 Release Candidate 1

NeMo Relay 0.3.0 Beta 2

0.3.0-beta.2

NeMo Release 0.3.0 Beta 2

NeMo Flow 0.2.0

We are proud to release NeMo Flow 0.2.0!

Key Features

• 🔭 First-class observability plugin with built-in ATOF, ATIF, OpenTelemetry, and OpenInference export support.
• 🚘 Common coding-agent sidecar (nemo-flow-cli) for closed harnesses including Claude Code, Codex, Cursor, and Hermes Agent.
• 🛠 CLI-guided setup for installing and configuring Claude Code, Codex, Cursor, and Hermes Agent hooks.
• 🦀 Native OpenClaw observability through the first-party nemo-flow-openclaw plugin.
• 🔗 First-party LangChain, LangGraph, and Deep Agents integrations using public plugin and middleware surfaces instead of patch-only workflows.
• 📡 Structured ATOF JSONL telemetry export for capturing agent trajectories and runtime events.
• 🛡 NeMo Guardrails plugin example for adding safety guardrails into NeMo Flow runtime behavior.

What's Changed

✨ New Features

• feat: add NeMo Guardrails example plugin by @afourniernv in #61
• feat: update opencode patch with ATOF JSONL export by @AnuradhaKaruppiah in #62
• feat: add coding-agent sidecar integrations by @willkill07 in #63
• feat: Add LangChain middleware integration by @dagardner-nv in #69
• feat: add OpenClaw observability plugin by @mnajafian-nv in #67
• feat: add ATOF JSONL exporter by @willkill07 in #88
• feat: Add LangGraph integration by @dagardner-nv in #80
• feat(cli): coding-agent sidecar UX — wizard, doctor, help, banner by @AjayThorve in #83
• feat: add core observability plugin by @willkill07 in #89
• feat(cli): load plugin configs from plugin.toml by @bbednarski9 in #93
• feat(cli): add nemo-flow plugins edit by @willkill07 in #98
• feat(codec): add missing optional AnnotatedLlmRequest/Response fields by @afourniernv in #76
• feat: use generic OpenClaw plugin config by @willkill07 in #102
• feat: update OpenClaw patch to use new config shape by @willkill07 in #111
• feat: Add Deep Agents integration by @dagardner-nv in #90

⚡ Improvements

• refactor: rename sidecar crate to CLI by @willkill07 in #77
• refactor: improve CLI coverage structure by @willkill07 in #108

🐛 Bug Fixes

• fix(ci,rust): improve Windows CI robustness by @willkill07 in #41
• fix(rust): python rust tests need isolation by @willkill07 in #43
• fix: add OpenClaw plugin to npm publishing by @mnajafian-nv in #82
• fix: enable TLS for OTLP HTTP export by @willkill07 in #92
• fix: preserve Go scope stacks across OS threads by @willkill07 in #100
• fix: clean Hermes CLI ATIF telemetry by @bbednarski9 in #101
• fix: address outstanding sonar issues by @willkill07 in #104
• fix: support Cursor CLI hook config by @AjayThorve in #109
• fix: add OpenClaw npm provenance metadata by @willkill07 in #114

✅ Tests

• test: isolate CLI config override tests by @willkill07 in #105

🧰 Maintenance

• chore: bump version to 0.2.0 by @willkill07 in #39
• ci: set nightly tag git identity by @willkill07 in #40
• ci: narrow review path filters by @willkill07 in #44
• ci: split CI pipeline workflows by @willkill07 in #46
• ci: fix GitLab npm artifactory publish config by @willkill07 in #47
• ci: fix codecov reporting and PR guidance by @willkill07 in #48
• ci: harden Go Windows linker setup by @willkill07 in #49
• ci: use GitHub-hosted Linux runners by @willkill07 in #50
• ci: install sphinx rustdoc generator by @willkill07 in #52
• ci: fix Codecov component paths by @willkill07 in #53
• ci: keep docs-only PR checks focused by @willkill07 in #54
• ci: improve workflow linting and job names by @willkill07 in #55
• ci: fix Codecov ignore paths by @willkill07 in #56
• chore: reduce attribution generator complexity by @willkill07 in #57
• ci: publish Cargo crates to Artifactory by @willkill07 in #59
• ci: cache pre-commit environments by @willkill07 in #58
• ci: authenticate Cargo Artifactory index fetch by @willkill07 in #60
• ci: update Cargo Artifactory publishing config by @willkill07 in #68
• ci(licensing): support license diff for PRs by @willkill07 in #72
• ci: use cargo env token for artifactory publish by @willkill07 in #74
• ci: fix Artifactory Cargo crate publishing by @willkill07 in #81
• chore: relax dependency codeowners review by @willkill07 in #87
• ci: align PR labels with Linear issue types by @willkill07 in #86
• ci: gate package jobs on package path changes by @willkill07 in #85
• chore: address Sonar scan issues by @willkill07 in #91
• chore: align release branching and nightly tagging flow by @willkill07 in #95
• chore: keep OpenClaw dependency in lockstep by @willkill07 in #107
• ci: fold OpenClaw checks into Node workflow by @willkill07 in #106
• chore: refresh dependency locks by @willkill07 in #112
• ci: trigger gitlab publishing from tags by @willkill07 in #116
• ci: update to install-action v2.77.6 by @dagardner-nv in #119

📝 Documentation Updates

• docs: require PR template in agent skill by @willkill07 in #45
• docs: add package README badges by @willkill07 in #51
• docs: fix versioned docs TypeScript resolution by @willkill07 in #84
• docs(openclaw): add plugin guide by @mnajafian-nv in #79
• docs: tolerate missing Node API docs declarations by @willkill07 in #94
• docs: relocate the langchain and langgraph integration documents by @dagardner-nv in #99
• docs: reorganize navigation and integration guidance by @willkill07 in #118

Other Changes

• Update the test-python-binding Skill with instructions about how tests should be written by @dagardner-nv in #96

New Contributors

• @afourniernv made their first contribution in #61
• @AnuradhaKaruppiah made their first contribution in #62
• @mnajafian-nv made their first contribution in #67
• @AjayThorve made their first contribution in #83
• @bbednarski9 made their first contribution in #93

Full Changelog: 0.1.0...0.2.0

NeMo Flow 0.1.0

What's Changed

The initial NeMo Flow release introduces:

• A Rust core runtime for scopes, middleware registries, lifecycle events, subscribers, plugins, tool calls, and LLM calls
• Primary Rust, Python, and Node.js documentation tracks
• ATIF, OpenTelemetry, and OpenInference subscriber/exporter surfaces
• An adaptive component for plugin-driven optimization behavior
• Sample third-party integration patches for selected agent frameworks and tools

Full Changelog: https://github.com/NVIDIA/NeMo-Flow/commits/0.1.0