bbs-md/.planning/phases/02-vault-core-and-rendering/02-02-SUMMARY.md

phase, plan, subsystem, tags, dependency_graph, tech-stack, key-files, key-decisions, patterns-established, requirements-completed, duration, completed

phase	plan	subsystem	tags	dependency_graph	tech-stack	key-files	key-decisions	patterns-established	requirements-completed	duration	completed
02-vault-core-and-rendering	02	renderer	pulldown-cmark ratatui syntax-highlighting cga-colors box-drawing markdown-rendering	requires provides affects phase provides 02-01 highlight_code(), OnceLock-based syntect initialization, CGA color mapping render_markdown() — markdown string to Vec<Line<'static>> conversion pipeline H1-H6 heading rendering with CGA colors and ═/─ decorators Bold/italic/inline code inline styling Ordered and unordered list rendering with ●/◦/▪ bullets Blockquote rendering with yellow │ border Horizontal rule rendering (full-width ─ in DarkGray) Image placeholder rendering [IMAGE alt] Fenced code block rendering with ╭─╮│╰─╯ borders + syntect highlighting GFM table rendering with ┌┬┐├┼┤└┴┘ full box-drawing grid 02-03-app-integration	added patterns RenderState struct with style_stack (Vec<Style>) for nested inline formatting Two-pass table rendering accumulate all cells, then emit box-drawing grid TextMergeStream wrapping Parser::new_ext to coalesce adjacent Text events emit_code_block() and emit_table() as standalone free functions called by RenderState methods All Span content uses .to_string() for owned strings — Vec<Line<'static>> with no lifetime leakage	created modified src/renderer.rs src/main.rs	Wrote full emit_code_block and emit_table implementations in Task 1 rather than stubs — stubs would have been discarded in Task 2; single pass was cleaner Removed unused push_fg and push_fg_mod helper methods — start_heading() constructs styles inline, keeping RenderState API minimal emit_code_block box_width computed as max(content_width + 4, lang.len() + 6) capped at terminal width — prevents border overflow on long lines Table n_cols derived from max(alignments.len(), max row length) — handles malformed tables with mismatched column counts gracefully	RenderState pattern: internal struct with push/pop style_stack, flush_line() accumulates then emits, finish() returns owned Vec<Line<'static>> Box-drawing code blocks: ╭─ lang ─╮ / │ content padding │ / ╰─╯ with DarkGray borders and Yellow lang label Box-drawing tables: ┌┬┐├┼┤└┴┘ with Cyan border_style and LightCyan+BOLD header row	REND-01 REND-02 REND-03 REND-04 REND-05 REND-06 REND-07 REND-08 REND-09 REND-10	4min	2026-02-28

Phase 02 Plan 02: Markdown Renderer Summary

pulldown-cmark event pipeline producing Vec<Line<'static>> with CGA-colored headings, syntax-highlighted fenced code blocks with ╭─╮│╰─╯ borders, and GFM tables with ┌┬┐├┼┤└┴┘ box-drawing grids

Performance

• Duration: 4 min
• Started: 2026-02-28T21:15:20Z
• Completed: 2026-02-28T21:19:00Z
• Tasks: 2
• Files modified: 2 (src/renderer.rs created, src/main.rs updated)

Accomplishments

• Complete render_markdown(input: &str, width: u16) -> Vec<Line<'static>> public function
• All Phase 2 REND-01 through REND-10 requirements implemented in one module
• Code blocks render with rounded box-drawing borders (╭─ lang ─╮ / │ │ / ╰──╯), language label in Yellow, content via crate::highlighter::highlight_code()
• GFM tables render with full DOS-style box grid (┌┬┐├┼┤└┴┘), bold LightCyan header row, Left/Right/Center column alignment

Task Commits

1. Task 1: Build core markdown renderer with inline and block elements - 9e6f79c (feat)
2. Task 2: Add code block borders with syntax highlighting and GFM table grid - 8690d2a (feat)

Files Created/Modified

• src/renderer.rs — Complete markdown-to-styled-lines conversion pipeline (717 lines); render_markdown() public API; RenderState internal struct with style stack, blockquote depth, list counters, two-pass table collection; emit_code_block() and emit_table() free functions
• src/main.rs — Added mod highlighter; mod renderer; mod vault; declarations (wiring for Plan 03)

Decisions Made

• Implemented full emit_code_block and emit_table in Task 1 rather than writing throwaway stubs — since both functions were already designed in the plan, writing real code once was cleaner than writing placeholder code twice
• Removed push_fg and push_fg_mod helper methods from RenderState after they proved unused — start_heading() constructs styles directly with .fg().add_modifier() inline
• Box width for code blocks capped at terminal width parameter to prevent overflow when code lines are longer than the terminal
• Table column count derived from max(alignments.len(), max row cell count) to handle pathological GFM tables with mismatched header/data column counts

Deviations from Plan

Auto-fixed Issues

1. [Rule 1 - Bug] Fixed type inference error in list item bullet computation

• Found during: Task 1 (cargo check feedback)
• Issue: let (bullet_str, new_counter) = match ... with None literals caused E0282: type annotations needed for Option<_> because Rust could not infer the Option type parameter from the unit arm
• Fix: Simplified the match to return only bullet_str: String, eliminating the unused new_counter binding entirely
• Files modified: src/renderer.rs
• Verification: cargo check passes without error
• Committed in: 9e6f79c (Task 1 commit, fixed inline during implementation)

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Total deviations: 1 auto-fixed (1 type inference bug caught during cargo check) Impact on plan: Minor Rust type inference issue resolved immediately; no scope creep.

Issues Encountered

None — plan executed cleanly after the type inference fix.

User Setup Required

None — no external service configuration required.

Next Phase Readiness

• render_markdown() is ready for Plan 03 app integration
• src/highlighter::init_highlighter() must be called in main() before any render_markdown() call (Plan 03 handles this)
• All Phase 2 rendering requirements (REND-01 through REND-10) are satisfied
• Dead-code warnings from unwired modules will resolve when Plan 03 wires renderer, vault, and highlighter into the event loop

Self-Check: PASSED

• src/renderer.rs exists with render_markdown(), emit_code_block(), emit_table(), RenderState
• src/main.rs contains mod highlighter; mod renderer; mod vault;
• Commit 9e6f79c exists in git log (Task 1: core renderer)
• Commit 8690d2a exists in git log (Task 2: code block borders + table grid)
• cargo check passes (19 expected dead_code warnings, 0 errors)
• 02-02-SUMMARY.md created at .planning/phases/02-vault-core-and-rendering/

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Phase: 02-vault-core-and-rendering Completed: 2026-02-28