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refactor(trace-utils)!: split generic TracerHeaderTags - #2279

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refactor(trace-utils)!: split generic TracerHeaderTags#2279
gh-worker-dd-mergequeue-cf854d[bot] merged 1 commit into
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@anais-raison

@anais-raison anais-raison commented Jul 27, 2026

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What does this PR do?

Splits TracerHeaderTags into two parts: the tracer-identity strings (lang, lang_version, tracer_version, etc.) stay as-is, and the generic bool/int flags (client_computed_stats, client_computed_top_level, dropped_p0_traces, dropped_p0_spans) are pulled into a new standalone TracerGenericTags struct, embedded as TracerHeaderTags::generic.

Motivation

TracerHeaderTags mixed tracer-identity strings with generic bool/int flags. The latter are meaningful independently of the string metadata, so pulling them into their own struct lets them be carried on their own in contexts where the string fields would be redundant (e.g. payload formats that already embed the tracer identity), without forcing a full split of the type.

Additional Notes

Raised during review of #2156. Prepared as a separate PR to keep #2156 scoped to the sidecar-specific V04→V1 changes.

This PR alone is a no-op refactor — TracerGenericTags is still only used embedded in TracerHeaderTags. The actual payoff comes in #2156: the V1 trace-sending path already carries the tracer identity in the V1 payload itself, so send_trace_v1 will be able to pass just TracerGenericTags (a small Copy struct, no serialization needed) across the sidecar's IPC boundary instead of the full TracerHeaderTags/SerializedTracerHeaderTags, which currently re-transmits redundant string data.

…nericTags

TracerHeaderTags mixed tracer-identity strings (lang, version, etc.) with
generic bool/int flags (client_computed_stats, dropped_p0_traces, ...).
The latter are meaningful independently of the string metadata, so pull
them into a standalone TracerGenericTags struct that can be carried on
its own where the string fields would be redundant.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
@anais-raison
anais-raison marked this pull request as ready for review July 27, 2026 11:53
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anais-raison requested review from a team as code owners July 27, 2026 11:53
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Tests

🎉 All green!

🧪 All tests passed
❄️ No new flaky tests detected

🎯 Code Coverage (details)
Patch Coverage: 92.59%
Overall Coverage: 74.61% (-0.01%)

This comment will be updated automatically if new data arrives.
🔗 Commit SHA: 7b79f50 | Docs | Datadog PR Page | Give us feedback!

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Comment thread libdd-trace-utils/src/tracer_header_tags.rs
@bwoebi bwoebi changed the title refactor(trace-utils): split generic TracerHeaderTags refactor(trace-utils)!: split generic TracerHeaderTags Jul 27, 2026
Comment thread libdd-trace-utils/src/tracer_header_tags.rs
@gh-worker-dd-mergequeue-cf854d
gh-worker-dd-mergequeue-cf854d Bot merged commit 79eff2f into main Jul 28, 2026
152 of 158 checks passed
@gh-worker-dd-mergequeue-cf854d
gh-worker-dd-mergequeue-cf854d Bot deleted the anais/split-tracer-header-tags branch July 28, 2026 13:33
hoolioh added a commit that referenced this pull request Aug 7, 2026
…er-flare (#2332)

# Release proposal for libdd-ffe, libdd-http-client, libdd-tracer-flare
and their dependencies

This PR contains version bumps based on public API changes and commits
since last release.

## libdd-capabilities
**Next version:** `3.0.0`
**Semver bump:** `major`
**Tag:** `libdd-capabilities-v3.0.0`

### Commits

- fix(telemetry)!: stop sending Connection: close to the Agent (#2286)
- feat(capabilities)!: Add streaming to http capabilities (#2251)
- feat: added file capability [APMSP-3780] (#2240)
- feat: added environment capability [APMSP-3780] (#2239)

## libdd-common
**Next version:** `5.1.1`
**Semver bump:** `patch`
**Tag:** `libdd-common-v5.1.1`

### Commits

- feat(telemetry)!: Add Installation signature and AppProduct changes
payloads (#2213)
- refactor: migrate to workspace dependencies, phase 4 (#2296)
- refactor: migrate to workspace dependencies, phase 3 (#2283)
- refactor: consolidate core dependencies at workspace level (phase 1)
(#2253)
- test: stabilize flaky tests (#2256)
- fix(sidecar): don't double-encode file:// telemetry endpoints (#2230)
- fix: last new clippy lint (#2221)

## libdd-tinybytes
**Next version:** `1.1.2`
**Semver bump:** `patch`
**Tag:** `libdd-tinybytes-v1.1.2`

### Commits

- chore: moving to workspace-level dependencies, phase 2 (#2270)
- refactor: consolidate core dependencies at workspace level (phase 1)
(#2253)

## libdd-trace-protobuf
**Next version:** `4.0.1`
**Semver bump:** `patch`
**Tag:** `libdd-trace-protobuf-v4.0.1`

### Commits

- refactor: migrate to workspace dependencies, phase 4 (#2296)
- chore: moving to workspace-level dependencies, phase 2 (#2270)
- refactor: consolidate core dependencies at workspace level (phase 1)
(#2253)
- feat(stats)!: implement additional metric tags in libdd-trace-stats
(#2170)

## libdd-capabilities-impl
**Next version:** `4.0.0`
**Semver bump:** `major`
**Tag:** `libdd-capabilities-impl-v4.0.0`

### ⚠️ major bump forced due to:

- `libdd-capabilities`: ^2.1.0 → ^3.0.0

### Commits

- feat(telemetry)!: Add Installation signature and AppProduct changes
payloads (#2213)
- refactor: migrate to workspace dependencies, phase 4 (#2296)
- fix(telemetry)!: stop sending Connection: close to the Agent (#2286)
- fix(remote-config)!: Expose HttpClientCapability in remote config
(#2252)
- feat(capabilities)!: Add streaming to http capabilities (#2251)
- refactor: consolidate core dependencies at workspace level (phase 1)
(#2253)
- feat: added file capability [APMSP-3780] (#2240)
- feat(telemetry)!: make telemetry worker wasm-compatible for the
TraceExporter (#2172)
- feat: added environment capability [APMSP-3780] (#2239)

## libdd-http-client
**Next version:** `1.0.0`
**Semver bump:** `major`
**Tag:** `libdd-http-client-v1.0.0`

**Warning:** this is an initial release. Please verify that the version
and commits included are correct.


## libdd-trace-normalization
**Next version:** `3.0.1`
**Semver bump:** `patch`
**Tag:** `libdd-trace-normalization-v3.0.1`

### Commits

- refactor: migrate to workspace dependencies, phase 4 (#2296)
- refactor: consolidate core dependencies at workspace level (phase 1)
(#2253)

## libdd-remote-config
**Next version:** `3.0.0`
**Semver bump:** `major`
**Tag:** `libdd-remote-config-v3.0.0`

### Commits

- refactor(rc)!: make conversion from RemoteConfigProduct back and forth
generally available (#2325)
- fix(wasm)!: finish the WASM port of remote-config (#2315)
- refactor: migrate to workspace dependencies, phase 3 (#2283)
- feat(rc): Handle expired config status (#2274)
- feat(remote-config)!: add AsmRawResponseBody capability (#2278)
- chore: moving to workspace-level dependencies, phase 2 (#2270)
- fix(remote-config)!: Expose HttpClientCapability in remote config
(#2252)
- refactor: consolidate core dependencies at workspace level (phase 1)
(#2253)
- fix(rc): Make Target fields available again after eaf5ad0 (#2232)
- fix: new clippy lints (#2219)

## libdd-trace-utils
**Next version:** `10.0.0`
**Semver bump:** `major`
**Tag:** `libdd-trace-utils-v10.0.0`

### ⚠️ major bump forced due to:

- `libdd-capabilities`: ^2.1.0 → ^3.0.0

### Commits

- refactor(rc)!: make conversion from RemoteConfigProduct back and forth
generally available (#2325)
- fix(libdd-trace-utils): apply SpanLink flags masking when v0.5 json
encoding (#2314)
- refactor: migrate to workspace dependencies, phase 4 (#2296)
- feat(data-pipeline)!: add compression option for agentless export
(#2205)
- refactor: migrate to workspace dependencies, phase 3 (#2283)
- refactor(trace-utils)!: split generic TracerHeaderTags (#2279)
- chore(lint): update nightly (#2281)
- chore: moving to workspace-level dependencies, phase 2 (#2270)
- fix(remote-config)!: Expose HttpClientCapability in remote config
(#2252)
- refactor: consolidate core dependencies at workspace level (phase 1)
(#2253)
- feat(stats)!: implement additional metric tags in libdd-trace-stats
(#2170)
- feat(trace-utils)!: add v1 decoder (#2174)
- feat(trace-utils)!: add encoder v1 to v04 + refactor (#2145)
- feat(otlp): add instrumentation scope metadata (#2235)
- fix(trace-utils)!: serialize v0.5 span links and events into meta
(#980)

## libdd-ffe
**Next version:** `1.0.0`
**Semver bump:** `major`
**Tag:** `libdd-ffe-v1.0.0`

**Warning:** this is an initial release. Please verify that the version
and commits included are correct.


## libdd-tracer-flare
**Next version:** `1.0.0`
**Semver bump:** `major`
**Tag:** `libdd-tracer-flare-v1.0.0`

**Warning:** this is an initial release. Please verify that the version
and commits included are correct.


[APMSP-3780]:
https://datadoghq.atlassian.net/browse/APMSP-3780?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ
[APMSP-3780]:
https://datadoghq.atlassian.net/browse/APMSP-3780?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ
[APMSP-3780]:
https://datadoghq.atlassian.net/browse/APMSP-3780?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: hoolioh <107922352+hoolioh@users.noreply.github.com>
hoolioh added a commit that referenced this pull request Aug 18, 2026
)

# Release proposal for libdd-data-pipeline, libdd-telemetry and their
dependencies

This PR contains version bumps based on public API changes and commits
since last release.

## libdd-ddsketch
**Next version:** `1.1.1`
**Semver bump:** `patch`
**Tag:** `libdd-ddsketch-v1.1.1`

### Commits

- refactor: migrate to workspace dependencies, phase 4 (#2296)
- chore: moving to workspace-level dependencies, phase 2 (#2270)

## libdd-shared-runtime
**Next version:** `3.0.0`
**Semver bump:** `major`
**Tag:** `libdd-shared-runtime-v3.0.0`

### ⚠️ major bump forced due to:

- `libdd-capabilities`: ^2.1.0 → ^3.0.0
- `libdd-capabilities-impl`: ^3.0.0 → ^4.0.0

### Commits

- feat(shared-runtime): add block_on_with_timeout to BlockingRuntime
(#2333)
- chore(runtime): restart all workers on invalid state (#2262)
- refactor: migrate to workspace dependencies, phase 3 (#2283)
- refactor: consolidate core dependencies at workspace level (phase 1)
(#2253)

## libdd-dogstatsd-client
**Next version:** `5.0.0`
**Semver bump:** `major`
**Tag:** `libdd-dogstatsd-client-v5.0.0`

### Commits

- refactor: consolidate core dependencies at workspace level (phase 1)
(#2253)
- feat(dogstatsd)!: add shared_runtime buffered sink (#2224)
- refactor(statsd)!: make client clonable (#2222)

## libdd-telemetry
**Next version:** `7.0.0`
**Semver bump:** `major`
**Tag:** `libdd-telemetry-v7.0.0`

### Commits

- refactor(rc)!: make conversion from RemoteConfigProduct back and forth
generally available (#2325)
- feat(telemetry)!: Add Installation signature and AppProduct changes
payloads (#2213)
- fix(telemetry)!: stop sending Connection: close to the Agent (#2286)
- refactor: migrate to workspace dependencies, phase 3 (#2283)
- chore: moving to workspace-level dependencies, phase 2 (#2270)
- refactor: consolidate core dependencies at workspace level (phase 1)
(#2253)
- fix: drain the mailbox before stopping (#2258)
- feat(telemetry)!: make telemetry worker wasm-compatible for the
TraceExporter (#2172)
- fix(sidecar): don't double-encode file:// telemetry endpoints (#2230)

## libdd-trace-obfuscation
**Next version:** `6.0.0`
**Semver bump:** `major`
**Tag:** `libdd-trace-obfuscation-v6.0.0`

### ⚠️ major bump forced due to:

- `libdd-trace-utils`: ^9.0.0 → ^10.1.0

### Commits

- refactor: migrate to workspace dependencies, phase 4 (#2296)
- chore(lint): update nightly (#2281)
- chore: moving to workspace-level dependencies, phase 2 (#2270)
- refactor: consolidate core dependencies at workspace level (phase 1)
(#2253)
- fix: new clippy lints (#2219)

## libdd-trace-stats
**Next version:** `7.0.0`
**Semver bump:** `major`
**Tag:** `libdd-trace-stats-v7.0.0`

### ⚠️ major bump forced due to:

- `libdd-capabilities`: ^2.1.0 → ^3.0.0
- `libdd-capabilities-impl`: ^3.0.0 → ^4.0.0
- `libdd-dogstatsd-client`: ^4.0.0 → ^5.0.0
- `libdd-telemetry`: ^6.0.0 → ^7.0.0
- `libdd-trace-utils`: ^9.0.0 → ^10.1.0

### Commits

- feat: add v1 isolated bricks for trace exporter (#2280)
- refactor: migrate to workspace dependencies, phase 4 (#2296)
- feat(data-pipeline)!: add compression option for agentless export
(#2205)
- feat(stats)!: per-field cardinality limits (#2211)
- refactor: migrate to workspace dependencies, phase 3 (#2283)
- feat(stats)!: string field length limit (#2267)
- feat(trace_exporter)!: add `restart_after_fork` configuration option
[APMSP-3843] (#2263)
- refactor: consolidate core dependencies at workspace level (phase 1)
(#2253)
- feat(stats)!: implement additional metric tags in libdd-trace-stats
(#2170)
- refactor(statsd)!: make client clonable (#2222)
- fix(stats-exporter): disable retries for stats payload sends (#2249)
- feat(telemetry)!: make telemetry worker wasm-compatible for the
TraceExporter (#2172)
- fix!: css obfuscation logic (#2203)

## libdd-data-pipeline
**Next version:** `8.0.0`
**Semver bump:** `major`
**Tag:** `libdd-data-pipeline-v8.0.0`

### ⚠️ major bump forced due to:

- `libdd-capabilities`: ^2.1.0 → ^3.0.0
- `libdd-capabilities-impl`: ^3.0.0 → ^4.0.0
- `libdd-dogstatsd-client`: ^4.0.0 → ^5.0.0
- `libdd-telemetry`: ^6.0.0 → ^7.0.0
- `libdd-trace-stats`: ^6.0.0 → ^7.0.0
- `libdd-trace-utils`: ^9.0.0 → ^10.1.0

### Commits

- fix(trace-exporter): mark OTLP client-computed stats (#2245)
- feat(data-pipeline): adds new attributes to OTLP trace metrics export
(#2316)
- feat: add v1 isolated bricks for trace exporter (#2280)
- feat(data-pipeline)!: add flush_and_close to the trace buffer (#2313)
- feat(telemetry)!: Add Installation signature and AppProduct changes
payloads (#2213)
- refactor: migrate to workspace dependencies, phase 4 (#2296)
- feat(data-pipeline)!: add compression option for agentless export
(#2205)
- fix(telemetry)!: stop sending Connection: close to the Agent (#2286)
- feat(stats)!: per-field cardinality limits (#2211)
- refactor: migrate to workspace dependencies, phase 3 (#2283)
- feat(stats)!: string field length limit (#2267)
- refactor(trace-utils)!: split generic TracerHeaderTags (#2279)
- chore: moving to workspace-level dependencies, phase 2 (#2270)
- feat(trace_exporter)!: add `restart_after_fork` configuration option
[APMSP-3843] (#2263)
- feat(data-pipeline): emit additional_metric_tags on OTLP span duration
metric (#2264)
- refactor: consolidate core dependencies at workspace level (phase 1)
(#2253)
- feat(dogstatsd)!: add shared_runtime buffered sink (#2224)
- feat(stats)!: implement additional metric tags in libdd-trace-stats
(#2170)
- refactor(statsd)!: make client clonable (#2222)
- feat(telemetry)!: make telemetry worker wasm-compatible for the
TraceExporter (#2172)
- feat(trace_exporter)!: remove deprecated methods (#2250)
- feat(trace-utils)!: add v1 decoder (#2174)
- feat(trace-utils)!: add encoder v1 to v04 + refactor (#2145)
- feat(otlp): add instrumentation scope metadata (#2235)
- fix(trace-utils)!: serialize v0.5 span links and events into meta
(#980)
- fix!: css obfuscation logic (#2203)
- test(data-pipeline): gate telemetry-only tests behind the telemetry
feature (#2204)


[APMSP-3843]:
https://datadoghq.atlassian.net/browse/APMSP-3843?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: hoolioh <107922352+hoolioh@users.noreply.github.com>
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