diff --git a/gf180mcu/openlane/gf180mcu_fd_sc_mcu7t5v0/config.tcl b/gf180mcu/openlane/gf180mcu_fd_sc_mcu7t5v0/config.tcl
index dd69d8f..613d3ff 100644
--- a/gf180mcu/openlane/gf180mcu_fd_sc_mcu7t5v0/config.tcl
+++ b/gf180mcu/openlane/gf180mcu_fd_sc_mcu7t5v0/config.tcl
@@ -41,13 +41,13 @@
 # TritonCTS configurations
 set ::env(CTS_ROOT_BUFFER) "$::env(STD_CELL_LIBRARY)__clkbuf_16"
 set ::env(CTS_CLK_BUFFER_LIST) "$::env(STD_CELL_LIBRARY)__clkbuf_2 $::env(STD_CELL_LIBRARY)__clkbuf_4 $::env(STD_CELL_LIBRARY)__clkbuf_8"
-set ::env(MAX_CAP) 0.5
+set ::env(CTS_MAX_CAP) 0.5
 
 set ::env(FP_PDN_RAIL_WIDTH) 0.6
 
 # The library maximum transition is 8.9ns; setting it to lower value
-set ::env(MAX_SLEW) 3
-set ::env(MAX_FANOUT) 10
+set ::env(MAX_TRANSITION_CONSTRAINT) 3
+set ::env(MAX_FANOUT_CONSTRAINT) 10
 
 set ::env(GPL_CELL_PADDING) {0}
 set ::env(DPL_CELL_PADDING) {0}
diff --git a/gf180mcu/openlane/gf180mcu_fd_sc_mcu9t5v0/config.tcl b/gf180mcu/openlane/gf180mcu_fd_sc_mcu9t5v0/config.tcl
index 66a2719..b7914a0 100644
--- a/gf180mcu/openlane/gf180mcu_fd_sc_mcu9t5v0/config.tcl
+++ b/gf180mcu/openlane/gf180mcu_fd_sc_mcu9t5v0/config.tcl
@@ -41,13 +41,13 @@
 # TritonCTS configurations
 set ::env(CTS_ROOT_BUFFER) "$::env(STD_CELL_LIBRARY)__clkbuf_16"
 set ::env(CTS_CLK_BUFFER_LIST) "$::env(STD_CELL_LIBRARY)__clkbuf_2 $::env(STD_CELL_LIBRARY)__clkbuf_4 $::env(STD_CELL_LIBRARY)__clkbuf_8"
-set ::env(MAX_CAP) 0.5
+set ::env(CTS_MAX_CAP) 0.5
 
 set ::env(FP_PDN_RAIL_WIDTH) 0.6
 
 # The library maximum transition is 8.9ns; setting it to lower value
-set ::env(MAX_SLEW) 3
-set ::env(MAX_FANOUT) 10
+set ::env(MAX_TRANSITION_CONSTRAINT) 3
+set ::env(MAX_FANOUT_CONSTRAINT) 10
 
 set ::env(GPL_CELL_PADDING) {0}
 set ::env(DPL_CELL_PADDING) {0}
diff --git a/sky130/openlane/sky130_fd_sc_hd/config.tcl b/sky130/openlane/sky130_fd_sc_hd/config.tcl
index ade7687..24f6a86 100755
--- a/sky130/openlane/sky130_fd_sc_hd/config.tcl
+++ b/sky130/openlane/sky130_fd_sc_hd/config.tcl
@@ -68,8 +68,8 @@
 set ::env(CTS_CLK_BUFFER_LIST) "sky130_fd_sc_hd__clkbuf_8 sky130_fd_sc_hd__clkbuf_4 sky130_fd_sc_hd__clkbuf_2"
 set ::env(FP_PDN_RAIL_WIDTH) 0.48
 # Determined from https://github.com/google/skywater-pdk-libs-sky130_fd_sc_hd/blob/ac7fb61f06e6470b94e8afdf7c25268f62fbd7b1/cells/clkbuf/sky130_fd_sc_hd__clkbuf_16__tt_025C_1v80.lib.json
-set ::env(MAX_CAP) 1.53169
-set ::env(MAX_SLEW) 0.75
-set ::env(MAX_FANOUT) 10
+set ::env(CTS_MAX_CAP) 1.53169
+set ::env(MAX_TRANSITION_CONSTRAINT) 0.75
+set ::env(MAX_FANOUT_CONSTRAINT) 10
 
 set ::env(TRISTATE_CELL_PREFIX) "$::env(STD_CELL_LIBRARY)__ebuf"
diff --git a/sky130/openlane/sky130_fd_sc_hdll/config.tcl b/sky130/openlane/sky130_fd_sc_hdll/config.tcl
index d7d87c9..005f4ec 100755
--- a/sky130/openlane/sky130_fd_sc_hdll/config.tcl
+++ b/sky130/openlane/sky130_fd_sc_hdll/config.tcl
@@ -65,8 +65,8 @@
 set ::env(CTS_CLK_BUFFER_LIST) "sky130_fd_sc_hdll__clkbuf_8 sky130_fd_sc_hdll__clkbuf_4 sky130_fd_sc_hdll__clkbuf_2"
 set ::env(FP_PDN_RAIL_WIDTH) 0.48
 # Determined from https://github.com/google/skywater-pdk-libs-sky130_fd_sc_hdll/blob/0694bd23893de20f5233ef024acf6cca1e750ac6/cells/clkbuf/sky130_fd_sc_hdll__clkbuf_16__tt_025C_1v80.lib.json
-set ::env(MAX_CAP) 1.03547
-set ::env(MAX_SLEW) 0.75
-set ::env(MAX_FANOUT) 10
+set ::env(CTS_MAX_CAP) 1.03547
+set ::env(MAX_TRANSITION_CONSTRAINT) 0.75
+set ::env(MAX_FANOUT_CONSTRAINT) 10
 
 set ::env(TRISTATE_CELL_PREFIX) "$::env(STD_CELL_LIBRARY)__ebuf"
diff --git a/sky130/openlane/sky130_fd_sc_hs/config.tcl b/sky130/openlane/sky130_fd_sc_hs/config.tcl
index bee06e6..0468817 100755
--- a/sky130/openlane/sky130_fd_sc_hs/config.tcl
+++ b/sky130/openlane/sky130_fd_sc_hs/config.tcl
@@ -63,9 +63,9 @@
 set ::env(CLK_BUFFER_INPUT) A
 set ::env(CLK_BUFFER_OUTPUT) X
 set ::env(CTS_CLK_BUFFER_LIST) "sky130_fd_sc_hs__clkbuf_8 sky130_fd_sc_hs__clkbuf_4 sky130_fd_sc_hs__clkbuf_2"
-set ::env(MAX_CAP) 1.8894300000
-set ::env(MAX_SLEW) 0.75
-set ::env(MAX_FANOUT) 10
+set ::env(CTS_MAX_CAP) 1.8894300000
+set ::env(MAX_TRANSITION_CONSTRAINT) 0.75
+set ::env(MAX_FANOUT_CONSTRAINT) 10
 set ::env(FP_PDN_RAIL_WIDTH) 0.48
 
 set ::env(TRISTATE_CELL_PREFIX) "$::env(STD_CELL_LIBRARY)__ebuf"
diff --git a/sky130/openlane/sky130_fd_sc_hvl/config.tcl b/sky130/openlane/sky130_fd_sc_hvl/config.tcl
index 3f3b27c..044ebfd 100644
--- a/sky130/openlane/sky130_fd_sc_hvl/config.tcl
+++ b/sky130/openlane/sky130_fd_sc_hvl/config.tcl
@@ -69,7 +69,7 @@
 set ::env(CLK_BUFFER_INPUT) A
 set ::env(CLK_BUFFER_OUTPUT) X
 set ::env(CTS_CLK_BUFFER_LIST) "sky130_fd_sc_hvl__buf_8 sky130_fd_sc_hvl__buf_4 sky130_fd_sc_hvl__buf_2"
-set ::env(MAX_CAP) 5.57100
-set ::env(MAX_SLEW) 0.75
-set ::env(MAX_FANOUT) 10
+set ::env(CTS_MAX_CAP) 5.57100
+set ::env(MAX_TRANSITION_CONSTRAINT) 0.75
+set ::env(MAX_FANOUT_CONSTRAINT) 10
 set ::env(FP_PDN_RAIL_WIDTH) 0.51
diff --git a/sky130/openlane/sky130_fd_sc_ls/config.tcl b/sky130/openlane/sky130_fd_sc_ls/config.tcl
index 1cfff0e..de0c19a 100755
--- a/sky130/openlane/sky130_fd_sc_ls/config.tcl
+++ b/sky130/openlane/sky130_fd_sc_ls/config.tcl
@@ -66,9 +66,9 @@
 set ::env(CLK_BUFFER_INPUT) A
 set ::env(CLK_BUFFER_OUTPUT) X
 set ::env(CTS_CLK_BUFFER_LIST) "sky130_fd_sc_ls__clkbuf_8 sky130_fd_sc_ls__clkbuf_4 sky130_fd_sc_ls__clkbuf_2"
-set ::env(MAX_CAP) 1.53169
-set ::env(MAX_SLEW) 0.75
-set ::env(MAX_FANOUT) 10
+set ::env(CTS_MAX_CAP) 1.53169
+set ::env(MAX_TRANSITION_CONSTRAINT) 0.75
+set ::env(MAX_FANOUT_CONSTRAINT) 10
 set ::env(FP_PDN_RAIL_WIDTH) 0.48
 
 set ::env(TRISTATE_CELL_PREFIX) "$::env(STD_CELL_LIBRARY)__ebuf"
diff --git a/sky130/openlane/sky130_fd_sc_ms/config.tcl b/sky130/openlane/sky130_fd_sc_ms/config.tcl
index 36f0cea..c6bc90b 100755
--- a/sky130/openlane/sky130_fd_sc_ms/config.tcl
+++ b/sky130/openlane/sky130_fd_sc_ms/config.tcl
@@ -65,9 +65,9 @@
 set ::env(CLK_BUFFER_INPUT) A
 set ::env(CLK_BUFFER_OUTPUT) X
 set ::env(CTS_CLK_BUFFER_LIST) "sky130_fd_sc_ms__clkbuf_8 sky130_fd_sc_ms__clkbuf_4 sky130_fd_sc_ms__clkbuf_2"
-set ::env(MAX_CAP) 1.53169
-set ::env(MAX_SLEW) 0.75
-set ::env(MAX_FANOUT) 10
+set ::env(CTS_MAX_CAP) 1.53169
+set ::env(MAX_TRANSITION_CONSTRAINT) 0.75
+set ::env(MAX_FANOUT_CONSTRAINT) 10
 set ::env(FP_PDN_RAIL_WIDTH) 0.48
 
 set ::env(TRISTATE_CELL_PREFIX) "$::env(STD_CELL_LIBRARY)__ebuf"
diff --git a/sky130/openlane/sky130_osu_sc_t18/config.tcl b/sky130/openlane/sky130_osu_sc_t18/config.tcl
index b9d6273..2aa5a05 100755
--- a/sky130/openlane/sky130_osu_sc_t18/config.tcl
+++ b/sky130/openlane/sky130_osu_sc_t18/config.tcl
@@ -69,6 +69,6 @@
 # TODO...
 set ::env(CTS_SQR_CAP) 0.258e-3
 set ::env(CTS_SQR_RES) 0.125
-set ::env(MAX_CAP) 1.53169
+set ::env(CTS_MAX_CAP) 1.53169
 
 set ::env(FP_PDN_RAIL_WIDTH) 0.48