CalderFlow

Create a sequential/chevron chart: a linear sequence of steps, phases, or stages (e.g. onboarding steps, project phases). NOT for branching logic — use create_flowchart for that. Include a 1-2 sentence description per step to make it presentation-ready. Aim for 4-6 steps: Presentation is one slide of at most 6. For a longer process, follow up with edit_chart set_presentation_steps choosing the 4-6 most important step IDs.

Create an entity-relationship diagram (database schema / data model) with typed fields, PK/FK markers, and crow's-foot relationships. Entity names UPPER_SNAKE_CASE, 3-8 focused fields each.

Create a presentation-ready flowchart or architecture diagram from Mermaid source. Use for branching processes, decision trees, and system architecture. Rules: start with 'flowchart TD' or 'flowchart LR'; solid arrows only (-->, optionally with |labels|); node shapes: A[Process] B{Decision} C([Start/End]). CalderFlow presents decisions as compact amber cards and terminals as green states, so use shapes semantically and do not add decorative classDef noise. CALIBRATE DETAIL: vague/ideation ask → 4-7 nodes, happy path + at most 2 essential decisions, NO subgraphs; detailed/spec-driven ask → subgraphs as phases, <=7 nodes per subgraph, <=18 nodes total (split the story into an overview plus detail chart beyond that). Consolidate checks that lead to the same outcome. If any subgraph is used, EVERY node—including starts, errors, and final outcomes—must be declared inside exactly one subgraph. Put internal edges inside their subgraph and cross-phase edges outside. Node labels 1-4 words; label every decision branch. Connect phases that hand off to each other. Returns the chart id + share URL. Give every node an icon with a %% nodeIcon line and mark the one step to remember with class keyStep (see the server instructions for icon names).

Create a funnel chart for filtering/narrowing processes where quantities reduce per stage (conversion funnels, pipelines). Include stage values when numbers are available; set conversionRates for proportional widths.

Create a lifecycle chart: phases across the top and milestones plotted on a curve. Each milestone has a level 1-10 setting its height — bell curves, S-curves, dips all emerge from levels. Use for product lifecycles, customer journeys, adoption/maturity curves. Every milestone needs a phaseId.

Create a timeline of events in chronological order (roadmaps, company history, sprint/release schedules). Every event needs a marker: supplied dates, relative time for a proposed plan, or Phase 1, Phase 2, etc. for an undated process. Never invent factual dates or measured durations. Include concise descriptions; group related events into eras.

Permanently delete a chart you own.

Edit an existing chart. Call get_chart first to see its current spec, then pass tool_calls (surgical edits) and/or mermaid (full source replacement, flowchart/ERD only). A create_* tool call replaces the chart's data wholesale and can switch its type. Valid tool names — flowchart: style_chart, update_node, delete_node, add_node, connect_nodes, delete_edge, organize_sections, add_section, update_section, delete_section, move_node_to_section, set_node_icon ({nodeId, icon} or icon "none" to remove), set_key_step ({nodeId} or "none"); process/funnel/timeline/lifecycle: set_item_icon ({itemId, icon} or icon "none") and set_key_item ({itemId} or "none"), plus icon on add_* calls; any type: set_slide_text ({headline, takeaway}) for the Designed presentation slide and set_walkthrough ({steps:[{id, caption}]}) for the Walkthrough (a flowchart with 2+ sections walks one step per section, using subgraph IDs; otherwise use node or item IDs); chevron: create_chevron_chart, add_step, update_step, delete_step, reorder_steps, set_presentation_steps, style_chevron_chart; funnel: create_funnel_chart, add_funnel_stage, update_funnel_stage, delete_funnel_stage, reorder_funnel_stages, style_funnel_chart; lifecycle: create_lifecycle_chart, add_lifecycle_milestone, update_lifecycle_milestone, delete_lifecycle_milestone, update_lifecycle_phase, style_lifecycle_chart; timeline: create_timeline_chart, add_timeline_event, update_timeline_event, delete_timeline_event, reorder_timeline_events, style_timeline_chart; erd: create_erd_chart, add_erd_entity, update_erd_entity, delete_erd_entity, add_erd_attribute, update_erd_attribute, delete_erd_attribute, add_erd_relationship, update_erd_relationship, delete_erd_relationship, set_erd_direction, style_erd_chart (set_erd_direction takes {direction: "vertical"|"horizontal"}). For chevron Presentation-only selection/order edits, use set_presentation_steps with {stepIds:[up to 6 existing IDs in featured order]} (or null to reset to all); never reorder_steps, delete_step, or rename Full steps to change a Presentation summary. Use organize_sections with {sections:[{sectionId,title,nodeIds}], ungroupedNodeIds?} for a complete multi-section regroup; omitted nodes are placed with their closest connected section. Input shapes otherwise match the get_chart spec data (e.g. add_node takes {nodeId, label, shape?, connectFrom?, connectTo?}; style_chart takes {target: ''|'all', bgColor?, textColor?, borderColor?}).

Fetch a chart's current spec (JSON) and editable source text, plus its share URL.

List your CalderFlow charts (id, title, type, share URL), newest first.