[docs] Add Markdown release notes

changelog/9.0.1.yaml

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+version: 9.0.1
+entries:
+    - kind: enhancement
+      summary: Update OTel components to v0.121.0
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/7686
+      issue: []
+      timestamp: 1743783374
+      file:
+        name: 1743783374-update-otel-v0.121.0.yaml
+        checksum: 3491d3c13b6ebd1e7895b337d901d7df3e77dce1
+    - kind: feature
+      summary: Add nopexporter to EDOT Collector
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/7788
+      issue: []
+      timestamp: 1744198660
+      file:
+        name: 1744198660-add-nopexporter.yaml
+        checksum: 9f989be89459d35a8fdc48362a0dad19880fa4e1
+    - kind: feature
+      summary: set collectors fullnameOverride for edot kube-stack values
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/7754
+      issue:
+        - https://github.com/elastic/elastic-agent/issues/7381
+      timestamp: 1744384247
+      file:
+        name: 1744384247-set-collector's-fullnameOverride-for-edot-kube-stack-values.yaml
+        checksum: d7ccd1a2a660e7e0cc8bed5fc91570465b9ff639
+    - kind: bug-fix
+      summary: Fix Managed OTLP Helm config to use current image repo.
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/7882
+      issue: []
+      timestamp: 1744839123
+      file:
+        name: 1744839123-fix-MOtel-config-image-value.yaml
+        checksum: cd9cb5f75e1b3983a48ee156e478e0a62051ffb6
+    - kind: breaking-change
+      summary: '[otel] Disable process scraper of hostmetrics receiver'
+      description: |
+        The process scraper collects metrics for all available processes of a host without an easy way to limit
+        this to only report top N process for example. This results in quite big amount of timeseries.
+        Since this is not quite critical for any of the available UIs or dashboards we decide to disable
+        it temporarily until we find a better solution. Users that specifically need these metrics
+        can also enable it back manually.
+        Related to https://github.com/open-telemetry/opentelemetry-collector-contrib/issues/39423.
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/7894
+      issue: []
+      timestamp: 1744886313
+      file:
+        name: 1744886313-otel_disable_process_scraper.yaml
+        checksum: 461df3d166c6ed60e8565e588b5ffce9078798ae

changelog/9.0.2.yaml

@@ -0,0 +1,40 @@
+version: 9.0.2
+entries:
+    - kind: bug-fix
+      summary: Preserve agent run state on DEB and RPM upgrades
+      description: |
+        Improves the upgrade process for Elastic Agent installed using DEB or RPM packages by copying the run directory from the previous installation into the new version's folder
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/7999
+      issue:
+        - https://github.com/elastic/elastic-agent/issues/3832
+      timestamp: 1745923884
+      file:
+        name: 1745923884-deb-rpm-preserve-run-state.yaml
+        checksum: f4aa59929c389c20bc8104c8da4824979c3b8f35
+    - kind: other
+      summary: NOTICE.txt now contains only those modules that are used by the Elastic Agent binaries.
+      description: |
+        Only those modules that the Elastic Agent binaries for various platforms directly
+        or indirectly depend on are now included in the NOTICE.txt file . Modules used for development
+        tooling are now excluded from NOTICE.txt.
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/8053
+      issue: []
+      timestamp: 1746636264
+      file:
+        name: 1746636264-fix-notice.yaml
+        checksum: 5e7c950a899c715c5c3bd7cc2c79e924f8f5585e
+    - kind: security
+      summary: Upgrade Go version to 1.24.3.
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/8109
+      issue: []
+      timestamp: 1746652545
+      file:
+        name: 1746652545-Upgrade-to-Go-1.24.3..yaml
+        checksum: c5b03e2e2685ef389a269f5904fdc53590c7e1b1

changelog/9.0.3.yaml

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+version: 9.0.3
+entries:
+    - kind: bug-fix
+      summary: Address a race condition that can occur in Agent diagnostics if log rotation runs while logs are being zipped.
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/8215
+      issue: []
+      timestamp: 1747938268
+      file:
+        name: 1747938268-fix-diag-race-condition.yaml
+        checksum: 25e4883c6751a854d4a2f0897fb83848416c855e
+    - kind: feature
+      summary: add cumulativetodeltaprocessor to EDOT collector
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/8352
+        - https://github.com/elastic/elastic-agent/pull/8573
+        - https://github.com/elastic/elastic-agent/pull/8575
+        - https://github.com/elastic/elastic-agent/pull/8616
+        - https://github.com/elastic/elastic-agent/pull/8372
+      issue: []
+      timestamp: 1749176965
+      file:
+        name: 1749176965-add-cumulativetodeltaprocessor.yaml
+        checksum: 6c4bc7565ed8fb801a1b02a01ee085488ae960e8
+    - kind: bug-fix
+      summary: Use paths.TempDir for diagnostics actions
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/8472
+      issue: []
+      timestamp: 1749742685
+      file:
+        name: 1749742685-Use-paths.TempDir-for-diagnostics-actions.yaml
+        checksum: 1357d25b03d628ff7234a15a51e5dba89459d340
+    # - kind: bug-fix
+    #   summary: Use Debian 11 to build linux/arm to match linux/amd64. Upgrades linux/arm64's statically linked glibc from 2.28 to 2.31.
+    #   description: ""
+    #   component: elastic-agent
+    #   pr:
+    #     - https://github.com/elastic/elastic-agent/pull/8497
+    #   issue: []
+    #   timestamp: 1749844873
+    #   file:
+    #     name: 1749844873-Use-Debian-11-for-linux-arm-to-match-linux-amd64.yaml
+    #     checksum: ddd1264b76219193cfed89ccc87e65b0144e4074
+    - kind: bug-fix
+      summary: relax file ownership check to allow admin re-enrollment on Windows
+      description: |
+        On Windows, the agent previously enforced a strict file ownership (SID) check during re-enrollment, which prevented legitimate admin users from re-enrolling the agent if the owner did not match. This PR changes the Windows-specific logic to a no-op, allowing any admin to re-enroll the agent. This restores usability for admin users, but reintroduces the risk that privileged re-enrollment can break unprivileged installs. The Unix-specific ownership check remains unchanged.
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/8503
+      issue:
+        - https://github.com/elastic/elastic-agent/issues/7794
+      timestamp: 1749923633
+      file:
+        name: 1749923633-Windows-relax-file-ownership-check-for-re-enrollment.yaml
+        checksum: 650d0f58770863722ed75c0b092c4578f420e1fe

changelog/9.0.4.yaml

@@ -0,0 +1,72 @@
+version: 9.0.4
+entries:
+    - kind: other
+      summary: Upgrade Synthetics NodeJS version to latest LTS v20.
+      description: ""
+      component: heartbeat
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/8712
+      issue: []
+      timestamp: 1751029489
+      file:
+        name: 1751029489-synth-upgra-node-v20.yaml
+        checksum: 26a735a19317db577652eea4bb1f3e863212da81
+    - kind: bug-fix
+      summary: Remove incorrect logging that unprivileged installations are in beta.
+      description: 'Unprivileged installations went GA in 8.15.0: https://www.elastic.co/docs/reference/fleet/elastic-agent-unprivileged'
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/8715
+      issue:
+        - https://github.com/elastic/elastic-agent/issues/8689
+      timestamp: 1751037802
+      file:
+        name: 1751037802-Stop-logging-that-unprivileged-installations-are-in-beta.yaml
+        checksum: 2c2f731f90638eaf61e8ec021ce3c4dd8885ff3a
+    - kind: feature
+      summary: Add file logs only managed OTLP input kube-stack configuration.
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/8785
+      issue: []
+      timestamp: 1751444462
+      file:
+        name: 1751444462-add_logs_only_motel_config.yaml
+        checksum: a7768ce2ec6de109e7a9efae7793231f4965cf00
+    - kind: bug-fix
+      summary: Ensure standalone Elastic Agent uses log level from configuration instead of persisted state.
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/8784
+      issue:
+        - https://github.com/elastic/elastic-agent/issues/8137
+      timestamp: 1751455886
+      file:
+        name: 1751455886-correct-log-level-for-standalone-agents.yaml
+        checksum: e954db0ba6e1738e3d425cf3c8110a40c296a013
+    - kind: bug-fix
+      summary: Resolve deadlocks in runtime checkin communication.
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/8881
+      issue:
+        - https://github.com/elastic/elastic-agent/issues/7944
+      timestamp: 1751960319
+      file:
+        name: 1751960319-fix-blocking-issues-inside-runtime-communicator.yaml
+        checksum: d288cc7474997883bc2a9118b2abf150126c9d8c
+    - kind: bug-fix
+      summary: Removed init.d support from RPM packages.
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/8896
+      issue:
+        - https://github.com/elastic/elastic-agent/issues/8840
+      timestamp: 1752049251
+      file:
+        name: 1752049251-Fixed-SUSE-installation-from-RPM.yaml
+        checksum: bb9eba27e2dfa5885a2abd6140ea506d143b21f5

changelog/9.0.5.yaml

@@ -0,0 +1,2 @@
+version: 9.0.5
+entries:

changelog/9.0.6.yaml

@@ -0,0 +1,97 @@
+version: 9.0.6
+entries:
+    - kind: feature
+      summary: Adjust the timeout for Elastic Defend check command
+      description: ""
+      component: ""
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/9523
+        - https://github.com/elastic/elastic-agent/pull/9524
+        - https://github.com/elastic/elastic-agent/pull/9542
+        - https://github.com/elastic/elastic-agent/pull/9213
+      issue: []
+      timestamp: 1753950420
+      file:
+        name: 1753950420-adjust-endpoint-check-timeout.yaml
+        checksum: 8128c245da5eef165a531e45f95e3f964bbd1817
+    - kind: bug-fix
+      summary: On Windows, retry saving the Agent information file to disk
+      description: |
+        Saving the Agent information file involves renaming/moving a file to its final destination. However, on Windows, it is sometimes not possible to rename/move a file to its destination file because the destination file is locked by another process (e.g. antivirus software). For such situations, we now retry the save operation on Windows.
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/9224
+      issue:
+        - https://github.com/elastic/elastic-agent/issues/5862
+      timestamp: 1754346816
+      file:
+        name: 1754346816-fleet-enc-save-retries.yaml
+        checksum: fab4b29d2404c210dcb1441eb88e84dd3f6c9ad1
+    - kind: bug-fix
+      summary: Correct hints annotations parsing to resolve only `${kubernetes.*}` placeholders instead of resolving all `${...}` patterns.
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/9307
+      issue: []
+      timestamp: 1754944400
+      file:
+        name: 1754944400-k8s-hints-env-vars-in-annotations.yaml
+        checksum: 55ccb4d795ad7556a9c8ecad5bd33a0a0893042b
+    - kind: bug-fix
+      summary: Treat exit code 28 from Endpoint binary as non-fatal
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/9320
+      issue: []
+      timestamp: 1755059673
+      file:
+        name: 1755059673-endpoint-28-not-fatal.yaml
+        checksum: d8fc4bbea824309297a7dcf508fd99fb62e86877
+    - kind: bug-fix
+      summary: Fixed jitter backoff strategy reset
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/9342
+      issue:
+        - https://github.com/elastic/elastic-agent/issues/8864
+      timestamp: 1755076749
+      file:
+        name: 1755076749-fix-jitter-backoff-strategy-reset.yaml
+        checksum: 1969a9a0221227c476f94e27a4ef3946b3853416
+    - kind: bug-fix
+      summary: 'Fix Docker container failing to start with no matching vars: ${env.ELASTICSEARCH_API_KEY:} and similar errors by restoring support for `:` to set default values.'
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/9451
+      issue:
+        - https://github.com/elastic/elastic-agent/issues/9328
+      timestamp: 1755544412
+      file:
+        name: 1755544412-Fix-default-constant-support-in-output-configuration.yaml
+        checksum: 9b389ac54a3b8a7aaec24da9223bff8a306c4d8b
+    - kind: security
+      summary: Upgrade to Go 1.24.6.
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/9287
+      issue: []
+      timestamp: 1755547590
+      file:
+        name: 1755547590-Upgrade-to-Go-1.24.6..yaml
+        checksum: e2f37c3bfe8bda55a0ec6c32cf604e44dc4f5d43
+    - kind: bug-fix
+      summary: Fix deb upgrade by stopping elastic-agent service before upgrading
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/9462
+      issue: []
+      timestamp: 1755601979
+      file:
+        name: 1755601979-deb-upgrade-stop-agent-service.yaml
+        checksum: 047a0f95507e83bc95ce969f6ea443abf55c521f