docs: fix formatting of autocomplete template variables

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Description

This PR fixes the formatting of Mustache variable syntax in the autocomplete template documentation for consistency. The variables were documented correctly (including the language parameter added in PR #1853), but had extra spaces in the Mustache syntax.

Changes

• Fixed formatting in docs/reference/json-reference.mdx: changed {{{ prefix }}} to {{{prefix}}} for consistency with Handlebars/Mustache best practices

Context

PR #1853 added the language parameter to autocomplete templates. Upon review, I found that:

1. The newer documentation in docs/customize/model-roles/autocomplete.mdx already correctly documents all template variables including language
2. The legacy JSON reference documentation listed all variables but had inconsistent formatting with extra spaces in the Mustache syntax

Checklist

• Documentation changes only
• No code changes required
• Consistent with existing documentation style

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This agent session was co-authored by nate and Continue.

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Summary by cubic

Fixed Mustache variable formatting in the autocomplete template reference by removing spaces inside variables (e.g., {{{ prefix }}} -> {{{prefix}}}). Aligns the legacy JSON reference with the newer autocomplete docs, including the language variable.

^{Written for commit 0bf2fc0. Summary will update automatically on new commits.}

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Summary of Documentation Review

I reviewed PR #1853 which added the language parameter to autocomplete templates. Here's what I found:

Current State

✅ Main documentation is already up-to-date: docs/customize/model-roles/autocomplete.mdx correctly documents all template variables including language

✅ Legacy JSON reference is accurate: docs/reference/json-reference.mdx lists all the correct variables including language

Minor Fix Applied

🔧 Fixed formatting inconsistency in the JSON reference doc by removing extra spaces in Mustache variable syntax ({{{ prefix }}} → {{{prefix}}})

Conclusion

The documentation for the language parameter added in PR #1853 is already complete and accurate. This PR just improves formatting consistency.

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Reviewed for AGENTS.md updates. This PR contains only documentation formatting changes (Mustache template syntax) with no impact on build steps, scripts, dependencies, or workflows. No updates to AGENTS.md are needed.

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No additional test coverage needed - this is a documentation-only change that fixes Mustache variable formatting. Documentation changes are validated through human review rather than automated tests.

[cubic-dev-ai]

No issues found across 1 file

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✅ PR is ready for review once CI checks complete.

This is a documentation-only change that fixes formatting consistency in Mustache variable syntax. No functional changes, no code changes - just removing extra spaces for consistency with Handlebars best practices.

The review from the automated tool found no issues.

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Documentation Updates

I've added a commit to fix the remaining Mustache template variable formatting issues across the documentation:

Files Updated:

1. docs/reference.mdx (line 142) - Fixed autocomplete template variables formatting
2. docs/customize/model-providers/more/morph.mdx (lines 26, 41) - Fixed apply template variables for Morph provider
3. docs/customize/model-providers/more/relace.mdx (line 19) - Fixed apply template variable for Relace provider

Changes Made:

• Removed extra spaces inside Mustache/Handlebars template variables
• Changed {{{ prefix }}} → {{{prefix}}} (and similar for other variables)
• Ensures consistency with the formatting in docs/customize/model-roles/autocomplete.mdx and docs/customize/model-roles/edit.mdx

All documentation now follows Handlebars/Mustache best practices with no spaces inside the triple braces.

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CI Failure Analysis

The CI failure is not related to this documentation change. Investigation shows:

Failed Test

TUIChat - Slash Commands Tests > filters slash commands when typing /log [REMOTE MODE] > works in remote mode

Error: Test expected UI to contain /exi but the screen hadn't updated yet (timing/flaky test issue)

Evidence This Is Pre-Existing

• This is a documentation-only change (formatting fix in .mdx file)
• CLI PR Checks are failing frequently on main branch as well
• The flaky test is in src/ui/__tests__/TUIChat.slashCommands.test.tsx
• Similar timing-related test failures seen in recent main branch runs

Action Taken

• Triggered CI re-run with empty commit to verify if it's intermittent
• This change cannot affect test behavior (documentation only)

If the test continues to fail, this indicates a flaky test that needs to be fixed separately from this documentation PR.