docs: custom context file names (#4077)

documentation/docs/guides/environment-variables.md

@@ -107,6 +107,7 @@ These variables control how Goose manages conversation sessions and context.
 |----------|---------|---------|---------|
 | `GOOSE_CONTEXT_STRATEGY` | Controls how Goose handles context limit exceeded situations | "summarize", "truncate", "clear", "prompt" | "prompt" (interactive), "summarize" (headless) |
 | `GOOSE_MAX_TURNS` | [Maximum number of turns](/docs/guides/smart-context-management#maximum-turns) allowed without user input | Integer (e.g., 10, 50, 100) | 1000 |
+| `CONTEXT_FILE_NAMES` | Specifies custom filenames for [hint/context files](/docs/guides/using-goosehints#custom-context-files) | JSON array of strings (e.g., `["CLAUDE.md", ".goosehints"]`) | `[".goosehints"]` |
 | `GOOSE_CLI_THEME` | [Theme](/docs/guides/goose-cli-commands#themes) for CLI response  markdown | "light", "dark", "ansi" | "dark" |
 | `GOOSE_SCHEDULER_TYPE` | Controls which scheduler Goose uses for [scheduled recipes](/docs/guides/recipes/session-recipes.md#schedule-recipe) | "legacy" or "temporal" | "legacy" (Goose's built-in cron scheduler) | 
 | `GOOSE_TEMPORAL_BIN` | Optional custom path to your Temporal binary | /path/to/temporal-service | None |
@@ -131,6 +132,9 @@ export GOOSE_MAX_TURNS=25
 # Set a reasonable limit for production
 export GOOSE_MAX_TURNS=100
 
+# Use multiple context files
+export CONTEXT_FILE_NAMES='["CLAUDE.md", ".goosehints", "project_rules.txt"]'
+
 # Set the ANSI theme for the session
 export GOOSE_CLI_THEME=ansi