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Replace olekukonko/tablewriter with stdlib text/tabwriter#49165

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lenaic/remove-tablewriter-dep
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Replace olekukonko/tablewriter with stdlib text/tabwriter#49165
gh-worker-dd-mergequeue-cf854d[bot] merged 2 commits intomainfrom
lenaic/remove-tablewriter-dep

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@L3n41c L3n41c commented Apr 10, 2026

What does this PR do?

Replaces the external github.com/olekukonko/tablewriter dependency with Go's standard library text/tabwriter. The two usages (demultiplexer_agent_printer.go and routestats.go) only need simple tab-aligned table output, which text/tabwriter handles natively with zero external dependencies.

Cell values are sanitized to replace tabs, newlines and carriage returns with spaces to prevent free-form text fields (e.g., service check messages) from corrupting the tabwriter column alignment.

Motivation

This change was originally part of the Kubernetes dependencies upgrade PR (#48796) and has been extracted into a standalone PR as suggested during code review.

The tablewriter v1.1.0 upgrade (pulled transitively by karpenter-provider-aws) introduced several new transitive dependencies (olekukonko/errors, olekukonko/ll, olekukonko/ts) that increased binary size beyond the static quality gate threshold (600 KiB) for IoT and Heroku agent flavors. Replacing with the stdlib equivalent removes the dependency entirely, regardless of which version is pulled transitively.

Describe how you validated your changes

  • dda inv test --targets=./pkg/aggregator/... — all 138 tests pass
  • dda inv tidy — go.mod/go.sum files are clean
  • Verified that olekukonko/tablewriter is no longer imported anywhere in the codebase

Additional Notes

The mattn/go-runewidth and clipperhouse/uax29 indirect dependencies in test/fakeintake/go.mod were also removed as they were only needed by tablewriter.

🤖 Generated with Claude Code

Replace the external github.com/olekukonko/tablewriter dependency with
Go's standard library text/tabwriter. The two usages
(demultiplexer_agent_printer.go and routestats.go) only need simple
tab-aligned table output, which text/tabwriter handles natively with
zero external dependencies.

Cell values are sanitized to replace tabs, newlines and carriage returns
with spaces to prevent free-form text fields from corrupting the
tabwriter column alignment.

This change was originally part of the Kubernetes dependencies upgrade
PR (#48796) and has been extracted into a standalone PR as suggested
during code review.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
@dd-octo-sts dd-octo-sts bot added the internal Identify a non-fork PR label Apr 10, 2026
@github-actions github-actions bot added the medium review PR review might take time label Apr 10, 2026
@L3n41c L3n41c added qa/no-code-change No code change in Agent code requiring validation changelog/no-changelog No changelog entry needed labels Apr 10, 2026
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L3n41c commented Apr 10, 2026

@codex review

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agent-platform-auto-pr bot commented Apr 10, 2026

Go Package Import Differences

Baseline: 2d6f5b3
Comparison: d40f669

binaryosarchchange
agentlinuxamd64
+0, -1
-github.com/olekukonko/tablewriter
agentlinuxarm64
+0, -1
-github.com/olekukonko/tablewriter
agentwindowsamd64
+0, -3
-github.com/clipperhouse/uax29/v2/graphemes
-github.com/mattn/go-runewidth
-github.com/olekukonko/tablewriter
agentdarwinamd64
+0, -3
-github.com/clipperhouse/uax29/v2/graphemes
-github.com/mattn/go-runewidth
-github.com/olekukonko/tablewriter
agentdarwinarm64
+0, -3
-github.com/clipperhouse/uax29/v2/graphemes
-github.com/mattn/go-runewidth
-github.com/olekukonko/tablewriter
iot-agentlinuxamd64
+0, -3
-github.com/clipperhouse/uax29/v2/graphemes
-github.com/mattn/go-runewidth
-github.com/olekukonko/tablewriter
iot-agentlinuxarm64
+0, -3
-github.com/clipperhouse/uax29/v2/graphemes
-github.com/mattn/go-runewidth
-github.com/olekukonko/tablewriter
heroku-agentlinuxamd64
+0, -3
-github.com/clipperhouse/uax29/v2/graphemes
-github.com/mattn/go-runewidth
-github.com/olekukonko/tablewriter
cluster-agentlinuxamd64
+0, -3
-github.com/clipperhouse/uax29/v2/graphemes
-github.com/mattn/go-runewidth
-github.com/olekukonko/tablewriter
cluster-agentlinuxarm64
+0, -3
-github.com/clipperhouse/uax29/v2/graphemes
-github.com/mattn/go-runewidth
-github.com/olekukonko/tablewriter
cluster-agent-cloudfoundrylinuxamd64
+0, -3
-github.com/clipperhouse/uax29/v2/graphemes
-github.com/mattn/go-runewidth
-github.com/olekukonko/tablewriter
cluster-agent-cloudfoundrylinuxarm64
+0, -3
-github.com/clipperhouse/uax29/v2/graphemes
-github.com/mattn/go-runewidth
-github.com/olekukonko/tablewriter
dogstatsdlinuxamd64
+0, -3
-github.com/clipperhouse/uax29/v2/graphemes
-github.com/mattn/go-runewidth
-github.com/olekukonko/tablewriter
dogstatsdlinuxarm64
+0, -3
-github.com/clipperhouse/uax29/v2/graphemes
-github.com/mattn/go-runewidth
-github.com/olekukonko/tablewriter

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func writeTable(w *bytes.Buffer, headers []string, data [][]string) {
tw := tabwriter.NewWriter(w, 0, 0, 1, ' ', 0)
fmt.Fprintln(tw, strings.ToUpper(strings.Join(headers, "\t")))
sanitizer := strings.NewReplacer("\t", " ", "\n", " ", "\r", " ")
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P2 Badge Sanitize all tabwriter control separators in table cells

writeTable only replaces \t, \n, and \r, but text/tabwriter also treats \v as a tab separator and \f as a line-break/flush delimiter. Because service-check messages are free-form, a payload containing either of those characters will still break column alignment (or split rows) in agent check --table output. Extending the sanitizer to normalize \v and \f avoids this regression from the previous renderer.

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Fixed in d40f669 — added \v and \f to the sanitizer alongside the existing \t, \n, \r. Good catch.

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agent-platform-auto-pr bot commented Apr 10, 2026

Files inventory check summary

File checks results against ancestor 2d6f5b3d:

Results for datadog-agent_7.79.0~devel.git.605.d40f669.pipeline.107056367-1_amd64.deb:

No change detected

Add \v (vertical tab) and \f (form feed) to the cell sanitizer alongside
\t, \n, and \r. These characters are treated specially by text/tabwriter
and could corrupt column alignment if present in cell values.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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cit-pr-commenter-54b7da bot commented Apr 10, 2026

Regression Detector

Regression Detector Results

Metrics dashboard
Target profiles
Run ID: 0ecc5aea-eec5-4537-b293-96ac33653ddd

Baseline: 5b413ef
Comparison: 78d47e9
Diff

Optimization Goals: ✅ No significant changes detected

Experiments ignored for regressions

Regressions in experiments with settings containing erratic: true are ignored.

perf experiment goal Δ mean % Δ mean % CI trials links
docker_containers_cpu % cpu utilization +3.05 [+0.04, +6.06] 1 Logs

Fine details of change detection per experiment

perf experiment goal Δ mean % Δ mean % CI trials links
docker_containers_cpu % cpu utilization +3.05 [+0.04, +6.06] 1 Logs
tcp_syslog_to_blackhole ingress throughput +1.95 [+1.80, +2.11] 1 Logs
quality_gate_metrics_logs memory utilization +1.50 [+1.26, +1.74] 1 Logs bounds checks dashboard
ddot_logs memory utilization +0.61 [+0.55, +0.67] 1 Logs
docker_containers_memory memory utilization +0.59 [+0.51, +0.67] 1 Logs
ddot_metrics_sum_delta memory utilization +0.31 [+0.15, +0.46] 1 Logs
file_tree memory utilization +0.31 [+0.25, +0.37] 1 Logs
ddot_metrics_sum_cumulativetodelta_exporter memory utilization +0.12 [-0.11, +0.35] 1 Logs
uds_dogstatsd_20mb_12k_contexts_20_senders memory utilization +0.07 [+0.01, +0.13] 1 Logs
file_to_blackhole_100ms_latency egress throughput +0.06 [-0.06, +0.19] 1 Logs
otlp_ingest_metrics memory utilization +0.05 [-0.11, +0.21] 1 Logs
tcp_dd_logs_filter_exclude ingress throughput +0.01 [-0.09, +0.12] 1 Logs
ddot_metrics memory utilization +0.01 [-0.17, +0.18] 1 Logs
uds_dogstatsd_to_api ingress throughput -0.00 [-0.21, +0.20] 1 Logs
uds_dogstatsd_to_api_v3 ingress throughput -0.00 [-0.21, +0.20] 1 Logs
quality_gate_idle memory utilization -0.03 [-0.08, +0.02] 1 Logs bounds checks dashboard
file_to_blackhole_500ms_latency egress throughput -0.04 [-0.44, +0.36] 1 Logs
file_to_blackhole_0ms_latency egress throughput -0.05 [-0.59, +0.49] 1 Logs
quality_gate_idle_all_features memory utilization -0.08 [-0.11, -0.05] 1 Logs bounds checks dashboard
file_to_blackhole_1000ms_latency egress throughput -0.12 [-0.55, +0.32] 1 Logs
ddot_metrics_sum_cumulative memory utilization -0.33 [-0.47, -0.18] 1 Logs
otlp_ingest_logs memory utilization -0.87 [-0.97, -0.77] 1 Logs
quality_gate_logs % cpu utilization -1.97 [-3.56, -0.39] 1 Logs bounds checks dashboard

Bounds Checks: ✅ Passed

perf experiment bounds_check_name replicates_passed observed_value links
docker_containers_cpu simple_check_run 10/10 535 ≥ 26
docker_containers_memory memory_usage 10/10 276.15MiB ≤ 370MiB
docker_containers_memory simple_check_run 10/10 708 ≥ 26
file_to_blackhole_0ms_latency memory_usage 10/10 0.19GiB ≤ 1.20GiB
file_to_blackhole_0ms_latency missed_bytes 10/10 0B = 0B
file_to_blackhole_1000ms_latency memory_usage 10/10 0.24GiB ≤ 1.20GiB
file_to_blackhole_1000ms_latency missed_bytes 10/10 0B = 0B
file_to_blackhole_100ms_latency memory_usage 10/10 0.20GiB ≤ 1.20GiB
file_to_blackhole_100ms_latency missed_bytes 10/10 0B = 0B
file_to_blackhole_500ms_latency memory_usage 10/10 0.22GiB ≤ 1.20GiB
file_to_blackhole_500ms_latency missed_bytes 10/10 0B = 0B
quality_gate_idle intake_connections 10/10 3 = 3 bounds checks dashboard
quality_gate_idle memory_usage 10/10 175.42MiB ≤ 181MiB bounds checks dashboard
quality_gate_idle_all_features intake_connections 10/10 3 = 3 bounds checks dashboard
quality_gate_idle_all_features memory_usage 10/10 498.52MiB ≤ 550MiB bounds checks dashboard
quality_gate_logs intake_connections 10/10 4 ≤ 6 bounds checks dashboard
quality_gate_logs memory_usage 10/10 206.19MiB ≤ 220MiB bounds checks dashboard
quality_gate_logs missed_bytes 10/10 0B = 0B bounds checks dashboard
quality_gate_metrics_logs cpu_usage 10/10 371.22 ≤ 2000 bounds checks dashboard
quality_gate_metrics_logs intake_connections 10/10 3 ≤ 6 bounds checks dashboard
quality_gate_metrics_logs memory_usage 10/10 408.28MiB ≤ 475MiB bounds checks dashboard
quality_gate_metrics_logs missed_bytes 10/10 0B = 0B bounds checks dashboard

Explanation

Confidence level: 90.00%
Effect size tolerance: |Δ mean %| ≥ 5.00%

Performance changes are noted in the perf column of each table:

  • ✅ = significantly better comparison variant performance
  • ❌ = significantly worse comparison variant performance
  • ➖ = no significant change in performance

A regression test is an A/B test of target performance in a repeatable rig, where "performance" is measured as "comparison variant minus baseline variant" for an optimization goal (e.g., ingress throughput). Due to intrinsic variability in measuring that goal, we can only estimate its mean value for each experiment; we report uncertainty in that value as a 90.00% confidence interval denoted "Δ mean % CI".

For each experiment, we decide whether a change in performance is a "regression" -- a change worth investigating further -- if all of the following criteria are true:

  1. Its estimated |Δ mean %| ≥ 5.00%, indicating the change is big enough to merit a closer look.

  2. Its 90.00% confidence interval "Δ mean % CI" does not contain zero, indicating that if our statistical model is accurate, there is at least a 90.00% chance there is a difference in performance between baseline and comparison variants.

  3. Its configuration does not mark it "erratic".

CI Pass/Fail Decision

Passed. All Quality Gates passed.

  • quality_gate_logs, bounds check missed_bytes: 10/10 replicas passed. Gate passed.
  • quality_gate_logs, bounds check intake_connections: 10/10 replicas passed. Gate passed.
  • quality_gate_logs, bounds check memory_usage: 10/10 replicas passed. Gate passed.
  • quality_gate_metrics_logs, bounds check cpu_usage: 10/10 replicas passed. Gate passed.
  • quality_gate_metrics_logs, bounds check intake_connections: 10/10 replicas passed. Gate passed.
  • quality_gate_metrics_logs, bounds check memory_usage: 10/10 replicas passed. Gate passed.
  • quality_gate_metrics_logs, bounds check missed_bytes: 10/10 replicas passed. Gate passed.
  • quality_gate_idle_all_features, bounds check intake_connections: 10/10 replicas passed. Gate passed.
  • quality_gate_idle_all_features, bounds check memory_usage: 10/10 replicas passed. Gate passed.
  • quality_gate_idle, bounds check intake_connections: 10/10 replicas passed. Gate passed.
  • quality_gate_idle, bounds check memory_usage: 10/10 replicas passed. Gate passed.

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Static quality checks

✅ Please find below the results from static quality gates
Comparison made with ancestor 2d6f5b3
📊 Static Quality Gates Dashboard
🔗 SQG Job

Successful checks

Info

Quality gate Change Size (prev → curr → max)
agent_deb_amd64 -71.76 KiB (0.01% reduction) 755.623 → 755.553 → 757.690
agent_deb_amd64_fips -75.7 KiB (0.01% reduction) 712.359 → 712.285 → 718.060
agent_heroku_amd64 -82.17 KiB (0.03% reduction) 313.319 → 313.238 → 322.130
agent_msi -84.14 KiB (0.01% reduction) 610.111 → 610.028 → 656.110
agent_rpm_amd64 -71.76 KiB (0.01% reduction) 755.607 → 755.536 → 757.660
agent_rpm_amd64_fips -75.7 KiB (0.01% reduction) 712.342 → 712.268 → 718.040
agent_rpm_arm64 -67.23 KiB (0.01% reduction) 733.778 → 733.712 → 739.380
agent_rpm_arm64_fips -67.17 KiB (0.01% reduction) 693.573 → 693.508 → 700.780
agent_suse_amd64 -71.76 KiB (0.01% reduction) 755.607 → 755.536 → 757.660
agent_suse_amd64_fips -75.7 KiB (0.01% reduction) 712.342 → 712.268 → 718.040
agent_suse_arm64 -67.23 KiB (0.01% reduction) 733.778 → 733.712 → 739.380
agent_suse_arm64_fips -67.17 KiB (0.01% reduction) 693.573 → 693.508 → 700.780
docker_agent_amd64 -71.75 KiB (0.01% reduction) 815.869 → 815.799 → 820.010
docker_agent_arm64 -67.23 KiB (0.01% reduction) 818.858 → 818.792 → 826.060
docker_agent_jmx_amd64 -71.76 KiB (0.01% reduction) 1006.785 → 1006.715 → 1010.890
docker_agent_jmx_arm64 -67.23 KiB (0.01% reduction) 998.552 → 998.486 → 1005.660
docker_cluster_agent_amd64 -86.09 KiB (0.04% reduction) 205.473 → 205.389 → 207.600
docker_cluster_agent_arm64 -34.09 KiB (0.02% reduction) 219.696 → 219.662 → 221.150
docker_dogstatsd_amd64 -8.0 KiB (0.02% reduction) 39.450 → 39.442 → 39.540
docker_dogstatsd_arm64 -4.03 KiB (0.01% reduction) 37.645 → 37.641 → 38.080
dogstatsd_deb_amd64 -12.03 KiB (0.04% reduction) 30.098 → 30.086 → 30.770
dogstatsd_deb_arm64 -12.03 KiB (0.04% reduction) 28.239 → 28.227 → 29.270
dogstatsd_rpm_amd64 -12.03 KiB (0.04% reduction) 30.098 → 30.086 → 30.770
dogstatsd_suse_amd64 -12.03 KiB (0.04% reduction) 30.098 → 30.086 → 30.770
iot_agent_deb_amd64 -82.03 KiB (0.18% reduction) 44.154 → 44.074 → 44.970
iot_agent_deb_arm64 -74.06 KiB (0.18% reduction) 41.154 → 41.082 → 42.560
iot_agent_deb_armhf -81.89 KiB (0.19% reduction) 41.891 → 41.811 → 42.740
iot_agent_rpm_amd64 -82.03 KiB (0.18% reduction) 44.155 → 44.075 → 44.970
iot_agent_suse_amd64 -82.03 KiB (0.18% reduction) 44.155 → 44.075 → 44.970
2 successful checks with minimal change (< 2 KiB)
Quality gate Current Size
docker_cws_instrumentation_amd64 7.142 MiB
docker_cws_instrumentation_arm64 6.689 MiB
On-wire sizes (compressed)
Quality gate Change Size (prev → curr → max)
agent_deb_amd64 +15.15 KiB (0.01% increase) 175.646 → 175.661 → 179.410
agent_deb_amd64_fips -37.23 KiB (0.02% reduction) 167.096 → 167.059 → 174.660
agent_heroku_amd64 -8.11 KiB (0.01% reduction) 75.183 → 75.175 → 80.310
agent_msi +4.0 KiB (0.00% increase) 139.875 → 139.879 → 147.550
agent_rpm_amd64 -89.05 KiB (0.05% reduction) 177.747 → 177.660 → 182.280
agent_rpm_amd64_fips -21.19 KiB (0.01% reduction) 168.610 → 168.589 → 174.430
agent_rpm_arm64 +2.37 KiB (0.00% increase) 160.151 → 160.154 → 163.800
agent_rpm_arm64_fips +8.2 KiB (0.01% increase) 152.164 → 152.172 → 157.120
agent_suse_amd64 -89.05 KiB (0.05% reduction) 177.747 → 177.660 → 182.280
agent_suse_amd64_fips -21.19 KiB (0.01% reduction) 168.610 → 168.589 → 174.430
agent_suse_arm64 +2.37 KiB (0.00% increase) 160.151 → 160.154 → 163.800
agent_suse_arm64_fips +8.2 KiB (0.01% increase) 152.164 → 152.172 → 157.120
docker_agent_amd64 -30.88 KiB (0.01% reduction) 269.573 → 269.542 → 274.040
docker_agent_arm64 -28.2 KiB (0.01% reduction) 256.639 → 256.611 → 262.520
docker_agent_jmx_amd64 -22.25 KiB (0.01% reduction) 338.217 → 338.195 → 342.660
docker_agent_jmx_arm64 -24.64 KiB (0.01% reduction) 321.277 → 321.253 → 327.100
docker_cluster_agent_amd64 -31.65 KiB (0.04% reduction) 71.995 → 71.964 → 73.460
docker_cluster_agent_arm64 -31.46 KiB (0.05% reduction) 67.521 → 67.490 → 68.680
docker_cws_instrumentation_amd64 neutral 2.999 MiB → 3.330
docker_cws_instrumentation_arm64 neutral 2.729 MiB → 3.090
docker_dogstatsd_amd64 -8.96 KiB (0.06% reduction) 15.244 → 15.235 → 15.870
docker_dogstatsd_arm64 -2.75 KiB (0.02% reduction) 14.555 → 14.552 → 14.890
dogstatsd_deb_amd64 -2.7 KiB (0.03% reduction) 7.942 → 7.939 → 8.830
dogstatsd_deb_arm64 neutral 6.822 MiB → 7.750
dogstatsd_rpm_amd64 neutral 7.950 MiB → 8.840
dogstatsd_suse_amd64 neutral 7.950 MiB → 8.840
iot_agent_deb_amd64 -14.44 KiB (0.12% reduction) 11.624 → 11.610 → 13.210
iot_agent_deb_arm64 -14.78 KiB (0.15% reduction) 9.935 → 9.920 → 11.620
iot_agent_deb_armhf -15.38 KiB (0.15% reduction) 10.138 → 10.123 → 11.780
iot_agent_rpm_amd64 -19.18 KiB (0.16% reduction) 11.643 → 11.624 → 13.230
iot_agent_suse_amd64 -19.18 KiB (0.16% reduction) 11.643 → 11.624 → 13.230

@L3n41c L3n41c marked this pull request as ready for review April 10, 2026 12:34
@L3n41c L3n41c requested review from a team as code owners April 10, 2026 12:34
@L3n41c L3n41c changed the title Replace olekukonko/tablewriter with stdlib text/tabwriter Replace olekukonko/tablewriter with stdlib text/tabwriter Apr 10, 2026
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Very much approve!

@gh-worker-dd-mergequeue-cf854d gh-worker-dd-mergequeue-cf854d bot merged commit 78d47e9 into main Apr 10, 2026
287 checks passed
@gh-worker-dd-mergequeue-cf854d gh-worker-dd-mergequeue-cf854d bot deleted the lenaic/remove-tablewriter-dep branch April 10, 2026 20:20
@github-actions github-actions bot added this to the 7.79.0 milestone Apr 10, 2026
dd-octo-sts-98cdbc bot pushed a commit that referenced this pull request Apr 10, 2026
…r` (#49165)

### What does this PR do?

Replaces the external `github.com/olekukonko/tablewriter` dependency with Go's standard library `text/tabwriter`. The two usages (`demultiplexer_agent_printer.go` and `routestats.go`) only need simple tab-aligned table output, which `text/tabwriter` handles natively with zero external dependencies.

Cell values are sanitized to replace tabs, newlines and carriage returns with spaces to prevent free-form text fields (e.g., service check messages) from corrupting the tabwriter column alignment.

### Motivation

This change was originally part of the Kubernetes dependencies upgrade PR (#48796) and has been extracted into a standalone PR as [suggested during code review](#48796 (comment)).

The `tablewriter` v1.1.0 upgrade (pulled transitively by `karpenter-provider-aws`) introduced several new transitive dependencies (`olekukonko/errors`, `olekukonko/ll`, `olekukonko/ts`) that increased binary size beyond the static quality gate threshold (600 KiB) for IoT and Heroku agent flavors. Replacing with the stdlib equivalent removes the dependency entirely, regardless of which version is pulled transitively.

### Describe how you validated your changes

- `dda inv test --targets=./pkg/aggregator/...` — all 138 tests pass
- `dda inv tidy` — go.mod/go.sum files are clean
- Verified that `olekukonko/tablewriter` is no longer imported anywhere in the codebase

### Additional Notes

The `mattn/go-runewidth` and `clipperhouse/uax29` indirect dependencies in `test/fakeintake/go.mod` were also removed as they were only needed by `tablewriter`.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: lenaic.huard <lenaic.huard@datadoghq.com>
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