Add optional telemetry observability backend

docs/user/safety-and-ecosystem.md

@@ -218,17 +218,39 @@ The Spec dashboard is available from an inspected `MCP` object. It shows:
 - server status and port
 - debug mode
 - registered tools and descriptions
-- observability enabled by default
+- observability status
 - per-tool timing metrics
 - traces for errors, outliers, and output overruns
 - recent logs
 
-Configure `mcp monitoringExportDirectory: aDirectory` to override the default
-`~/pharo-mcp-observability` export root for instance metadata,
-`logs.jsonl`, `metrics.json`, and `traces.jsonl`.
+MCP starts with a no-op observability backend. Enable the built-in JSON
+observability backend explicitly:
+
+```smalltalk
+mcp observabilityEnabled: true
+```
+
+By default, JSON observability exports under the image-local
+`pharo-local/mcp/observability` directory. Configure
+`mcp observabilityExportDirectory: aDirectory` to override that export root for
+instance metadata, `logs.jsonl`, `metrics.json`, and `traces.jsonl`.
+
+OpenTelemetry support is optional. Load the `OpenTelemetry` group, then enable
+the OpenTelemetry backend for an MCP instance:
+
+```smalltalk
+Metacello new
+   baseline: 'MCP';
+   repository: 'github://Evref-BL/MCP:main/src';
+   load: 'OpenTelemetry'.
+
+mcp useOpenTelemetryObservability
+```
 
 ## Version Compatibility
 
-The baseline loads PharoCompatibility, JRPC, and TinyLogger. CI covers Pharo 12,
-13, and 14. Code that depends on version-sensitive Pharo APIs should go through
-PharoCompatibility rather than assuming the Pharo 13 API is present everywhere.
+The core baseline loads PharoCompatibility, JRPC, and PCRE2.
+OpenTelemetry is loaded only by the optional `OpenTelemetry` group. CI covers
+Pharo 12, 13, and 14. Code that depends on version-sensitive Pharo APIs should
+go through PharoCompatibility rather than assuming the Pharo 13 API is present
+everywhere.

src/BaselineOfMCP/BaselineOfMCP.class.st

@@ -26,14 +26,14 @@ BaselineOfMCP >> defineDependencies: spec [
 			spec
 				repository: 'github://juliendelplanque/JRPC:v3.2.1/src';
 				loads: #( 'Deployment' ) ];
-		baseline: 'TinyLogger' with: [
-			spec
-				repository: 'github://jecisc/TinyLogger:v1.x.x/src';
-				loads: #( 'Core' ) ];
 		baseline: 'PCRE2' with: [
 			spec
 				repository: 'github://Gabriel-Darbord/pharo-pcre2:v1.0.0/src';
-				loads: #( 'Core' ) ]
+				loads: #( 'Core' ) ];
+		baseline: 'OpenTelemetryPharo' with: [
+			spec
+				repository: 'github://Gabriel-Darbord/opentelemetry-pharo:main/src';
+				loads: #( 'traces' 'metrics' 'logs' ) ]
 ]
 
 { #category : 'baselines' }
@@ -42,6 +42,7 @@ BaselineOfMCP >> defineGroups: spec [
 	spec
 		group: 'Core' with: #( 'MCP' );
 		group: 'UI' with: #( 'MCP-UI' );
+		group: 'OpenTelemetry' with: #( 'MCP-OpenTelemetry' );
 		group: 'Tests' with: #( 'MCP-Tests-Resources' 'MCP-Tests-RunResources' 'MCP-Tests' 'MCP-Tests-Resources-Extensions' );
 		group: 'UI Tests' with: #( 'MCP-UI-Tests' );
 		group: 'default' with: #( 'Core' 'UI' 'Tests' 'UI Tests' )
@@ -51,8 +52,9 @@ BaselineOfMCP >> defineGroups: spec [
 BaselineOfMCP >> definePackages: spec [
 	"common"
 
-	spec package: 'MCP' with: [ spec requires: #( 'PharoCompatibility' 'JRPC' 'TinyLogger' 'PCRE2' ) ].
+	spec package: 'MCP' with: [ spec requires: #( 'PharoCompatibility' 'JRPC' 'PCRE2' ) ].
 	spec package: 'MCP-UI' with: [ spec requires: #( 'MCP' ) ].
+	spec package: 'MCP-OpenTelemetry' with: [ spec requires: #( 'MCP' 'OpenTelemetryPharo' ) ].
 	spec package: 'MCP-Tests-Resources' with: [ spec requires: #( 'MCP' ) ].
 	spec package: 'MCP-Tests-RunResources' with: [ spec requires: #( 'MCP-Tests-Resources' ) ].
 	spec package: 'MCP-Tests' with: [ spec requires: #( 'MCP' 'MCP-Tests-Resources' 'MCP-Tests-RunResources' ) ].

src/MCP-OpenTelemetry/MCP.extension.st

@@ -0,0 +1,8 @@
+Extension { #name : 'MCP' }
+
+{ #category : '*MCP-OpenTelemetry' }
+MCP >> useOpenTelemetryObservability [
+
+	self observability: MCPOpenTelemetryObservabilityBackend new.
+	^ self observability
+]