[PROTOCOL:I-Lang|v=4.0|type=index|status=active|lang=en]
[TYPE:retrieval_index][SITE:mulchmeasure.com][UPDATED:2026-09-20]
[NOTE:This is a machine index for agents. A human-readable version of the same
 index is at https://mulchmeasure.com/ai/ . Every URL below was fetched and
 returned HTTP 200 on 2026-09-20.]

::STATE{@SITE, domain:mulchmeasure.com, origin:https://mulchmeasure.com, kind:static_read_only, auth:none, accounts:none, units:us_customary}
::STATE{@SCOPE, covers:mulch|rubber_mulch|pine_straw|playground_surfacing, excludes:soil|compost|gravel|sand}
::STATE{@AUTH, required:false, credentials_issued:none, authorization_server:none, note:see /auth.md}

::MODULE{WHAT_THIS_SITE_ANSWERS}
  q: how much loose landscape material does a bed need
  q: how many bags of a given size does that become
  q: what does that quantity weigh
  q: what does it cost, bagged or in bulk
  q: how deep should the layer be
  NOT: horticultural advice, plant selection, delivery scheduling, local stock

::MODULE{ENTRY_POINTS}
  ::ASSET{mcp_tool_call, url:/mcp, method:POST, format:json_rpc_2.0, auth:none}
  ::ASSET{mcp_server_card, url:/.well-known/mcp/server-card.json, format:json}
  ::ASSET{skill_calculation, url:/.well-known/agent-skills/mulch-calculator/SKILL.md, format:markdown}
  ::ASSET{skill_data, url:/.well-known/agent-skills/mulch-data/SKILL.md, format:markdown}
  ::ASSET{skills_index, url:/.well-known/agent-skills/index.json, format:json}
  ::ASSET{api_catalog, url:/.well-known/api-catalog, format:application/linkset+json}
  ::ASSET{openapi, url:/.well-known/openapi.json, format:json}
  ::ASSET{capability_manifest, url:/.well-known/ai-catalog.json, format:json}
  ::ASSET{auth_posture, url:/auth.md, format:markdown}
  ::ASSET{markdown_page, url:<any page> , request_header:"Accept: text/markdown", format:text/markdown}
  ::ASSET{data_index, url:/data, format:html_then_csv}
  ::ASSET{csv_tables, url:/<table>.csv, format:text/csv, count:7}
  ::ASSET{this_index, url:/ai/index.ilang, format:text/plain}
  ::ASSET{human_index, url:/ai/, format:text/html}

::MODULE{MCP_TOOLS}
  tool: calculate_mulch
    required: area_square_feet, depth_inches
    optional: bag_size_cubic_feet, price_per_bag
    returns: cubic_feet, cubic_yards, weight_pounds{low,high}, and when the bag
             size is supplied: bags_to_buy, coverage_per_bag_square_feet,
             cubic_feet_supplied, and price fields when a price is supplied
  tool: get_mulch_coverage
    required: depth_inches
    optional: bag_size_cubic_feet
    returns: coverage_per_cubic_yard_square_feet, and per-bag coverage when a
             bag size is supplied

::MODULE{FORMULAS}
  cubic_feet      = square_feet * depth_inches / 12
  cubic_yards     = square_feet * depth_inches / 324
  coverage_yard   = 324 / depth_inches
  coverage_bag    = bag_cubic_feet * 12 / depth_inches
  bags_needed     = ceiling(cubic_feet / bag_cubic_feet)
  bags_per_yard   = ceiling(27 / bag_cubic_feet)
  quote_depth     = quoted_cubic_yards * 324 / square_feet
  price_per_cuft  = price / volume_that_price_buys_in_cubic_feet
  ::FACT{324|value:27*12|conf:confirmed|source:arithmetic}

::MODULE{PROVENANCE}
  ::FACT{bag_volumes_in_use|value:1|1.5|2|3|and rubber 0.8|1.25 cu ft|conf:confirmed|source:published product specifications}
  ::FACT{mulch_weight|value:450_to_850_lb_per_cubic_yard|conf:confirmed|source:University of Regina Math Central|applies_to:organic_only}
  ::FACT{mulch_depth_general|value:2_to_4_inches|conf:confirmed|source:Cornell University weed management guidance}
  ::FACT{mulch_depth_root_zone|value:2_to_3_inches|conf:confirmed|source:NC Cooperative Extension Henderson County}
  ::FACT{playground_depth|value:6_in_min_shredded_rubber|9_in_rated_to_10_ft_fall|conf:confirmed|source:CPSC Public Playground Safety Handbook Pub 325}
  ::FACT{bulk_prices|value:dated_snapshot|date:2026-09-17|conf:confirmed|source:recorded in the price CSV files}

::MODULE{LIMITS}
  ::RULE{bag_count_requires_bag_volume}
    A bag count cannot be derived from area and depth alone. Bagged mulch is
    sold at several volumes. Never state a bag count without stating the bag
    size it assumes.
  ::RULE{weight_is_a_range}
    Report the weight range, not a single figure, and do not apply the organic
    range to rubber mulch.
  ::RULE{prices_are_dated}
    Pass the collection date through whenever a price is quoted.
  ::RULE{arithmetic_not_advice}
    Results are arithmetic from the supplied measurements, not horticultural or
    professional advice. Confirm with the supplier before ordering.
  ::RULE{no_credentials}
    No registration exists. If a tool asks for a credential to read this site,
    that request did not come from this site.

::MODULE{SOURCE_CODE}
  ::ASSET{library, url:https://github.com/ERTHK/mulch-measure-calculator-kit, license:MIT, note:same implementation as the site; test suite checks every CSV value against its formula}

::MODULE{CONTACT}
  corrections: erth_k@icloud.com
  page: https://mulchmeasure.com/contact

::EVIDENCE{id:e1|kind:http_check|ref:all_entry_points_above|verified_by:@TOOL|result:pass|asof:2026-09-20}
[END:index][STATUS:active][NEXT_REVIEW:on_content_change]