[codex] Add second-based OTEL duration histograms#27058
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## Why Metric descriptions should be declared with reusable OTEL instruments instead of being coupled to individual consumers. Counter descriptions are the smallest API primitive needed by the exec-server observability work. ## What changed - Adds `counter_with_description` while preserving the existing counter API. - Caches counters by name and description so instrument metadata remains part of the declaration identity. - Covers the exported description together with the existing value and attribute contract. This PR only adds counter descriptions. It does not add gauges, second-based durations, or exec-server adoption. ## Stack 1. **#26091: counter descriptions** 2. #27057: gauge instruments 3. #27058: second-based duration histograms Related independent coverage: #27059 tests OTLP HTTP log and trace event export. The `codex-exec-server` bounded service tag now stays with the exec-server adoption change instead of this reusable infrastructure stack. ## Validation - `just test -p codex-otel` - `just fix -p codex-otel` - `just fmt`
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## Why Metric descriptions should be declared with reusable OTEL instruments instead of being coupled to individual consumers. Counter descriptions are the smallest API primitive needed by the exec-server observability work. ## What changed - Adds `counter_with_description` while preserving the existing counter API. - Caches counters by name and description so instrument metadata remains part of the declaration identity. - Covers the exported description together with the existing value and attribute contract. This PR only adds counter descriptions. It does not add gauges, second-based durations, or exec-server adoption. ## Stack 1. **openai#26091: counter descriptions** 2. openai#27057: gauge instruments 3. openai#27058: second-based duration histograms Related independent coverage: openai#27059 tests OTLP HTTP log and trace event export. The `codex-exec-server` bounded service tag now stays with the exec-server adoption change instead of this reusable infrastructure stack. ## Validation - `just test -p codex-otel` - `just fix -p codex-otel` - `just fmt`
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## Why Metric descriptions should be declared with reusable OTEL instruments instead of being coupled to individual consumers. Counter descriptions are the smallest API primitive needed by the exec-server observability work. ## What changed - Adds `counter_with_description` while preserving the existing counter API. - Caches counters by name and description so instrument metadata remains part of the declaration identity. - Covers the exported description together with the existing value and attribute contract. This PR only adds counter descriptions. It does not add gauges, second-based durations, or exec-server adoption. ## Stack 1. **openai#26091: counter descriptions** 2. openai#27057: gauge instruments 3. openai#27058: second-based duration histograms Related independent coverage: openai#27059 tests OTLP HTTP log and trace event export. The `codex-exec-server` bounded service tag now stays with the exec-server adoption change instead of this reusable infrastructure stack. ## Validation - `just test -p codex-otel` - `just fix -p codex-otel` - `just fmt`
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## Why Metric descriptions should be declared with reusable OTEL instruments instead of being coupled to individual consumers. Counter descriptions are the smallest API primitive needed by the exec-server observability work. ## What changed - Adds `counter_with_description` while preserving the existing counter API. - Caches counters by name and description so instrument metadata remains part of the declaration identity. - Covers the exported description together with the existing value and attribute contract. This PR only adds counter descriptions. It does not add gauges, second-based durations, or exec-server adoption. ## Stack 1. **openai#26091: counter descriptions** 2. openai#27057: gauge instruments 3. openai#27058: second-based duration histograms Related independent coverage: openai#27059 tests OTLP HTTP log and trace event export. The `codex-exec-server` bounded service tag now stays with the exec-server adoption change instead of this reusable infrastructure stack. ## Validation - `just test -p codex-otel` - `just fix -p codex-otel` - `just fmt`
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Jun 9, 2026
## Why Metric descriptions should be declared with reusable OTEL instruments instead of being coupled to individual consumers. Counter descriptions are the smallest API primitive needed by the exec-server observability work. ## What changed - Adds `counter_with_description` while preserving the existing counter API. - Caches counters by name and description so instrument metadata remains part of the declaration identity. - Covers the exported description together with the existing value and attribute contract. This PR only adds counter descriptions. It does not add gauges, second-based durations, or exec-server adoption. ## Stack 1. **openai#26091: counter descriptions** 2. openai#27057: gauge instruments 3. openai#27058: second-based duration histograms Related independent coverage: openai#27059 tests OTLP HTTP log and trace event export. The `codex-exec-server` bounded service tag now stays with the exec-server adoption change instead of this reusable infrastructure stack. ## Validation - `just test -p codex-otel` - `just fix -p codex-otel` - `just fmt`
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Jun 9, 2026
## Why Metric descriptions should be declared with reusable OTEL instruments instead of being coupled to individual consumers. Counter descriptions are the smallest API primitive needed by the exec-server observability work. ## What changed - Adds `counter_with_description` while preserving the existing counter API. - Caches counters by name and description so instrument metadata remains part of the declaration identity. - Covers the exported description together with the existing value and attribute contract. This PR only adds counter descriptions. It does not add gauges, second-based durations, or exec-server adoption. ## Stack 1. **openai#26091: counter descriptions** 2. openai#27057: gauge instruments 3. openai#27058: second-based duration histograms Related independent coverage: openai#27059 tests OTLP HTTP log and trace event export. The `codex-exec-server` bounded service tag now stays with the exec-server adoption change instead of this reusable infrastructure stack. ## Validation - `just test -p codex-otel` - `just fix -p codex-otel` - `just fmt`
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## Why Metric descriptions should be declared with reusable OTEL instruments instead of being coupled to individual consumers. Counter descriptions are the smallest API primitive needed by the exec-server observability work. ## What changed - Adds `counter_with_description` while preserving the existing counter API. - Caches counters by name and description so instrument metadata remains part of the declaration identity. - Covers the exported description together with the existing value and attribute contract. This PR only adds counter descriptions. It does not add gauges, second-based durations, or exec-server adoption. ## Stack 1. **openai#26091: counter descriptions** 2. openai#27057: gauge instruments 3. openai#27058: second-based duration histograms Related independent coverage: openai#27059 tests OTLP HTTP log and trace event export. The `codex-exec-server` bounded service tag now stays with the exec-server adoption change instead of this reusable infrastructure stack. ## Validation - `just test -p codex-otel` - `just fix -p codex-otel` - `just fmt`
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## Why Metric descriptions should be declared with reusable OTEL instruments instead of being coupled to individual consumers. Counter descriptions are the smallest API primitive needed by the exec-server observability work. ## What changed - Adds `counter_with_description` while preserving the existing counter API. - Caches counters by name and description so instrument metadata remains part of the declaration identity. - Covers the exported description together with the existing value and attribute contract. This PR only adds counter descriptions. It does not add gauges, second-based durations, or exec-server adoption. ## Stack 1. **openai#26091: counter descriptions** 2. openai#27057: gauge instruments 3. openai#27058: second-based duration histograms Related independent coverage: openai#27059 tests OTLP HTTP log and trace event export. The `codex-exec-server` bounded service tag now stays with the exec-server adoption change instead of this reusable infrastructure stack. ## Validation - `just test -p codex-otel` - `just fix -p codex-otel` - `just fmt`
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## Why Metric descriptions should be declared with reusable OTEL instruments instead of being coupled to individual consumers. Counter descriptions are the smallest API primitive needed by the exec-server observability work. ## What changed - Adds `counter_with_description` while preserving the existing counter API. - Caches counters by name and description so instrument metadata remains part of the declaration identity. - Covers the exported description together with the existing value and attribute contract. This PR only adds counter descriptions. It does not add gauges, second-based durations, or exec-server adoption. ## Stack 1. **openai#26091: counter descriptions** 2. openai#27057: gauge instruments 3. openai#27058: second-based duration histograms Related independent coverage: openai#27059 tests OTLP HTTP log and trace event export. The `codex-exec-server` bounded service tag now stays with the exec-server adoption change instead of this reusable infrastructure stack. ## Validation - `just test -p codex-otel` - `just fix -p codex-otel` - `just fmt`
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## Why Metric descriptions should be declared with reusable OTEL instruments instead of being coupled to individual consumers. Counter descriptions are the smallest API primitive needed by the exec-server observability work. ## What changed - Adds `counter_with_description` while preserving the existing counter API. - Caches counters by name and description so instrument metadata remains part of the declaration identity. - Covers the exported description together with the existing value and attribute contract. This PR only adds counter descriptions. It does not add gauges, second-based durations, or exec-server adoption. ## Stack 1. **openai#26091: counter descriptions** 2. openai#27057: gauge instruments 3. openai#27058: second-based duration histograms Related independent coverage: openai#27059 tests OTLP HTTP log and trace event export. The `codex-exec-server` bounded service tag now stays with the exec-server adoption change instead of this reusable infrastructure stack. ## Validation - `just test -p codex-otel` - `just fix -p codex-otel` - `just fmt`
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## Why Exec-server observability needs current-value measurements in addition to counters. The reusable OTEL client should expose that primitive without coupling it to exec-server runtime behavior. ## What changed - Adds integer gauge instruments, with optional descriptions. - Caches gauges by name and description so instrument metadata remains part of the declaration identity. - Covers gauge values, descriptions, merged attributes, and OTLP HTTP export. This PR only adds the gauge primitive. It does not add second-based duration histograms or exec-server adoption. ## Stack 1. #26091: counter descriptions 2. **#27057: gauge instruments** 3. #27058: second-based duration histograms Related independent coverage: #27059 tests OTLP HTTP log and trace event export. ## Validation - `just test -p codex-otel` - `just fix -p codex-otel` - `just fmt`
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## Why Metric descriptions should be declared with reusable OTEL instruments instead of being coupled to individual consumers. Counter descriptions are the smallest API primitive needed by the exec-server observability work. ## What changed - Adds `counter_with_description` while preserving the existing counter API. - Caches counters by name and description so instrument metadata remains part of the declaration identity. - Covers the exported description together with the existing value and attribute contract. This PR only adds counter descriptions. It does not add gauges, second-based durations, or exec-server adoption. ## Stack 1. **openai#26091: counter descriptions** 2. openai#27057: gauge instruments 3. openai#27058: second-based duration histograms Related independent coverage: openai#27059 tests OTLP HTTP log and trace event export. The `codex-exec-server` bounded service tag now stays with the exec-server adoption change instead of this reusable infrastructure stack. ## Validation - `just test -p codex-otel` - `just fix -p codex-otel` - `just fmt`
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## Why Exec-server observability needs current-value measurements in addition to counters. The reusable OTEL client should expose that primitive without coupling it to exec-server runtime behavior. ## What changed - Adds integer gauge instruments, with optional descriptions. - Caches gauges by name and description so instrument metadata remains part of the declaration identity. - Covers gauge values, descriptions, merged attributes, and OTLP HTTP export. This PR only adds the gauge primitive. It does not add second-based duration histograms or exec-server adoption. ## Stack 1. openai#26091: counter descriptions 2. **openai#27057: gauge instruments** 3. openai#27058: second-based duration histograms Related independent coverage: openai#27059 tests OTLP HTTP log and trace event export. ## Validation - `just test -p codex-otel` - `just fix -p codex-otel` - `just fmt`
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## Why The generic OTLP HTTP paths for log events and trace events need end-to-end coverage before exec-server relies on them. ## What changed - Adds loopback coverage for exporting `codex_otel.log_only` events to `/v1/logs`. - Verifies `codex_otel.trace_safe` events are present in the exported trace payload. This is a test-only PR. It does not change OTEL runtime behavior or metric APIs. ## Related work - #26091: counter descriptions - #27057: gauge instruments - #27058: second-based duration histograms This PR is independent and can land directly on `main`. ## Validation - `just test -p codex-otel` - `just fix -p codex-otel` - `just fmt`
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Why
Exec-server request and connection latencies need fractional-second histograms. The existing duration API records integer milliseconds and uses millisecond-scale buckets.
What changed
Durationvalues as fractional seconds.This PR only adds the duration primitive. It does not add exec-server adoption.
Stack
Related independent coverage: #27059 tests OTLP HTTP log and trace event export.
Validation
just test -p codex-otel