fix(docs,aliases): remove aspirational Amazon Q --mcp-config support

- Update ai-provider-agnosticism.md to reflect reality: Amazon Q uses MCP subcommands, not CLI flags
- Clean up duplicate lines in ai-providers.sh
- Document that Amazon Q imports MCP config during setup, not via alias
- Add explanatory comments about the different integration methods

Amazon Q 1.12.7 does not support --mcp-config or --add-dir flags. MCP configuration
is handled through `q mcp import` during setup.sh execution.

Principle: systems-stewardship

Author: atxtechbro

.bash_aliases.d/ai-providers.sh

@@ -7,16 +7,7 @@ else
     alias claude='claude --mcp-config "$DOT_DEN/mcp/mcp.json" --add-dir "$DOT_DEN/knowledge"'
 fi
 
-DOT_DEN="${DOT_DEN:-$HOME/ppv/pillars/dotfiles}"
-
-# Common parameters for claude and q aliases
-COMMON_PARAMS="--mcp-config \"$DOT_DEN/mcp/mcp.json\" --add-dir \"$DOT_DEN/knowledge\""
-
-# Claude alias with automatic Opus model on personal machines
-if [[ "${WORK_MACHINE}" != "true" ]]; then
-    alias claude="claude --model claude-opus-4-20250514 $COMMON_PARAMS"
-else
-    alias claude="claude $COMMON_PARAMS"
-fi
-
-alias q="q $COMMON_PARAMS"
+# Amazon Q uses MCP subcommands, not --mcp-config flag
+# MCP servers are imported by setup-provider-agnostic-mcp.sh during setup
+# To manually import: q mcp import --file "$DOT_DEN/mcp/mcp.json" global --force
+alias q='q'

knowledge/principles/ai-provider-agnosticism.md

@@ -8,11 +8,15 @@ AI services experience outages and rate limits. Provider agnosticism enables sea
 
 ## Architecture Pattern
 
-**Symmetric Configuration**: Both providers use identical MCP servers and knowledge directory patterns:
+**Symmetric Capabilities**: Both providers access identical MCP servers and knowledge directory, but through different integration methods:
 
 ```bash
+# Claude Code: Direct file reference via CLI flags
 alias claude='claude --mcp-config "$DOT_DEN/mcp/mcp.json" --add-dir "$DOT_DEN/knowledge"'
-alias q='q --mcp-config "$DOT_DEN/mcp/mcp.json" --add-dir "$DOT_DEN/knowledge"'
+
+# Amazon Q: MCP import during setup (no CLI flag support)
+# Setup runs: q mcp import --file "$DOT_DEN/mcp/mcp.json" global --force
+alias q='q'
 ```
 
 ## Implementation